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Implement timed_thread rewrite in C++.

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Rewrote timed_thread library in C++ using fancy new C++0x features.  The
main reason for this is to phase out poor encapsulation and C-style
function pointers.
This commit is contained in:
Brenden Matthews 2010-01-02 23:59:24 -08:00
parent 58cbbf57a3
commit 01ac47d082
16 changed files with 463 additions and 510 deletions
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4
cmake/Conky.cmake
View File

@ -97,6 +97,10 @@ endif(NOT RELEASE)
mark_as_advanced(APP_GAWK APP_WC APP_DATE APP_UNAME) mark_as_advanced(APP_GAWK APP_WC APP_DATE APP_UNAME)
if(CMAKE_BUILD_TYPE MATCHES "Debug")
set(DEBUG true)
endif(CMAKE_BUILD_TYPE MATCHES "Debug")
# The version numbers are simply derived from the date and number of commits # The version numbers are simply derived from the date and number of commits
# since start of month # since start of month
if(DEBUG) if(DEBUG)

4
cmake/ConkyBuildOptions.cmake
View File

@ -43,10 +43,6 @@ if(MAINTAINER_MODE)
endif(MAINTAINER_MODE) endif(MAINTAINER_MODE)
if(CMAKE_BUILD_TYPE MATCHES "Debug")
set(DEBUG true)
endif(CMAKE_BUILD_TYPE MATCHES "Debug")
option(RELEASE "Build release package" false) option(RELEASE "Build release package" false)
mark_as_advanced(RELEASE) mark_as_advanced(RELEASE)

6
src/CMakeLists.txt
View File

@ -35,7 +35,7 @@ if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/build.h)
endif(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/build.h) endif(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/build.h)
set(conky_sources colours.c combine.c common.c conky.cc core.cc diskio.c set(conky_sources colours.c combine.c common.c conky.cc core.cc diskio.c
entropy.c exec.c fs.c mail.c mixer.c net_stat.c template.c timed_thread.c entropy.c exec.cc fs.c mail.cc mixer.c net_stat.c template.c timed_thread.cc
mboxscan.c read_tcp.c scroll.c specials.c tailhead.c temphelper.c mboxscan.c read_tcp.c scroll.c specials.c tailhead.c temphelper.c
text_object.c timeinfo.c top.c algebra.c prioqueue.c proc.c user.c) text_object.c timeinfo.c top.c algebra.c prioqueue.c proc.c user.c)
@ -84,12 +84,12 @@ if(BUILD_IBM)
endif(BUILD_IBM) endif(BUILD_IBM)
if(BUILD_MPD) if(BUILD_MPD)
set(mpd mpd.c libmpdclient.c) set(mpd mpd.cc libmpdclient.c)
set(optional_sources ${optional_sources} ${mpd}) set(optional_sources ${optional_sources} ${mpd})
endif(BUILD_MPD) endif(BUILD_MPD)
if(BUILD_MOC) if(BUILD_MOC)
set(moc moc.c) set(moc moc.cc)
set(optional_sources ${optional_sources} ${moc}) set(optional_sources ${optional_sources} ${moc})
endif(BUILD_MOC) endif(BUILD_MOC)

9
src/conky.cc
View File

@ -33,10 +33,9 @@
#include "conky.h" #include "conky.h"
#include "common.h" #include "common.h"
#include "timed_thread.h" #include "timed_thread.h"
#include <ctype.h>
#include <stdarg.h> #include <stdarg.h>
#include <math.h> #include <cmath>
#include <time.h> #include <ctime>
#include <locale.h> #include <locale.h>
#include <signal.h> #include <signal.h>
#include <errno.h> #include <errno.h>
@ -787,7 +786,7 @@ void evaluate(const char *text, char *p, int p_max_size)
struct text_object subroot; struct text_object subroot;
parse_conky_vars(&subroot, text, p, p_max_size); parse_conky_vars(&subroot, text, p, p_max_size);
DBGP("evaluated '%s' to '%s'", text, p); DBGP2("evaluated '%s' to '%s'", text, p);
free_text_objects(&subroot); free_text_objects(&subroot);
} }
@ -2374,7 +2373,7 @@ void clean_up(void *memtofree1, void* memtofree2)
if(memtofree2) { if(memtofree2) {
free(memtofree2); free(memtofree2);
} }
timed_thread_destroy_registered_threads(); timed_thread::destroy_registered_threads();
if (info.cpu_usage) { if (info.cpu_usage) {
free(info.cpu_usage); free(info.cpu_usage);

74
src/exec.c → src/exec.cc
View File

@ -1,5 +1,5 @@
/* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*- /* -*- mode: c++; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
* vim: ts=4 sw=4 noet ai cindent syntax=c * vim: ts=4 sw=4 noet ai cindent syntax=cpp
* *
* Conky, a system monitor, based on torsmo * Conky, a system monitor, based on torsmo
* *
@ -38,6 +38,7 @@
#include <sys/types.h> #include <sys/types.h>
#include <sys/wait.h> #include <sys/wait.h>
#include <unistd.h> #include <unistd.h>
#include <mutex>
struct execi_data { struct execi_data {
double last_update; double last_update;
@ -45,8 +46,9 @@ struct execi_data {
char *cmd; char *cmd;
char *buffer; char *buffer;
double data; double data;
timed_thread *p_timed_thread; timed_thread_ptr p_timed_thread;
float barnum; float barnum;
execi_data() : last_update(0), interval(0), cmd(0), data(0), barnum(0) {}
}; };
/* FIXME: this will probably not work, since the variable is being reused /* FIXME: this will probably not work, since the variable is being reused
@ -175,7 +177,7 @@ static double read_exec_barnum(const char *data)
char *buf = NULL; char *buf = NULL;
double barnum; double barnum;
buf = malloc(text_buffer_size); buf = (char*)malloc(text_buffer_size);
read_exec(data, buf, text_buffer_size); read_exec(data, buf, text_buffer_size);
barnum = get_barnum(buf); barnum = get_barnum(buf);
@ -184,16 +186,13 @@ static double read_exec_barnum(const char *data)
return barnum; return barnum;
} }
static void *threaded_exec(void *) __attribute__((noreturn)); static void threaded_exec(thread_handle &handle, struct text_object *obj)
static void *threaded_exec(void *arg)
{ {
char *buff, *p2; char *buff, *p2;
struct text_object *obj = arg; struct execi_data *ed = (struct execi_data *)obj->data.opaque;
struct execi_data *ed = obj->data.opaque;
while (1) { while (1) {
buff = malloc(text_buffer_size); buff = (char*)malloc(text_buffer_size);
read_exec(ed->cmd, buff, text_buffer_size); read_exec(ed->cmd, buff, text_buffer_size);
p2 = buff; p2 = buff;
while (*p2) { while (*p2) {
@ -202,13 +201,15 @@ static void *threaded_exec(void *arg)
} }
p2++; p2++;
} }
timed_thread_lock(ed->p_timed_thread);
if (ed->buffer) {
free(ed->buffer); std::lock_guard<std::mutex> lock(handle.mutex());
ed->buffer = buff; if (ed->buffer)
timed_thread_unlock(ed->p_timed_thread); free(ed->buffer);
if (timed_thread_test(ed->p_timed_thread, 0)) { ed->buffer = buff;
timed_thread_exit(ed->p_timed_thread); }
if (handle.test(0)) {
return;
} }
} }
/* never reached */ /* never reached */
@ -244,8 +245,7 @@ void scan_execi_arg(struct text_object *obj, const char *arg)
struct execi_data *ed; struct execi_data *ed;
int n; int n;
ed = malloc(sizeof(struct execi_data)); ed = new execi_data;
memset(ed, 0, sizeof(struct execi_data));
if (sscanf(arg, "%f %n", &ed->interval, &n) <= 0) { if (sscanf(arg, "%f %n", &ed->interval, &n) <= 0) {
NORM_ERR("${execi* <interval> command}"); NORM_ERR("${execi* <interval> command}");
@ -276,7 +276,7 @@ void scan_execgraph_arg(struct text_object *obj, const char *arg)
struct execi_data *ed; struct execi_data *ed;
char *buf; char *buf;
ed = malloc(sizeof(struct execi_data)); ed = new execi_data;
memset(ed, 0, sizeof(struct execi_data)); memset(ed, 0, sizeof(struct execi_data));
buf = scan_graph(obj, arg, 100); buf = scan_graph(obj, arg, 100);
@ -300,7 +300,7 @@ void print_execp(struct text_object *obj, char *p, int p_max_size)
struct text_object subroot; struct text_object subroot;
char *buf; char *buf;
buf = malloc(text_buffer_size); buf = (char*)malloc(text_buffer_size);
memset(buf, 0, text_buffer_size); memset(buf, 0, text_buffer_size);
read_exec(obj->data.s, buf, text_buffer_size); read_exec(obj->data.s, buf, text_buffer_size);
@ -312,14 +312,14 @@ void print_execp(struct text_object *obj, char *p, int p_max_size)
void print_execi(struct text_object *obj, char *p, int p_max_size) void print_execi(struct text_object *obj, char *p, int p_max_size)
{ {
struct execi_data *ed = obj->data.opaque; struct execi_data *ed = (struct execi_data *)obj->data.opaque;
if (!ed) if (!ed)
return; return;
if (time_to_update(ed)) { if (time_to_update(ed)) {
if (!ed->buffer) if (!ed->buffer)
ed->buffer = malloc(text_buffer_size); ed->buffer = (char*)malloc(text_buffer_size);
read_exec(ed->cmd, ed->buffer, text_buffer_size); read_exec(ed->cmd, ed->buffer, text_buffer_size);
ed->last_update = current_update_time; ed->last_update = current_update_time;
} }
@ -328,7 +328,7 @@ void print_execi(struct text_object *obj, char *p, int p_max_size)
void print_execpi(struct text_object *obj, char *p, int p_max_size) void print_execpi(struct text_object *obj, char *p, int p_max_size)
{ {
struct execi_data *ed = obj->data.opaque; struct execi_data *ed = (struct execi_data *)obj->data.opaque;
struct text_object subroot; struct text_object subroot;
if (!ed) if (!ed)
@ -336,7 +336,7 @@ void print_execpi(struct text_object *obj, char *p, int p_max_size)
if (time_to_update(ed)) { if (time_to_update(ed)) {
if (!ed->buffer) if (!ed->buffer)
ed->buffer = malloc(text_buffer_size); ed->buffer = (char*)malloc(text_buffer_size);
read_exec(ed->cmd, ed->buffer, text_buffer_size); read_exec(ed->cmd, ed->buffer, text_buffer_size);
ed->last_update = current_update_time; ed->last_update = current_update_time;
@ -347,28 +347,23 @@ void print_execpi(struct text_object *obj, char *p, int p_max_size)
void print_texeci(struct text_object *obj, char *p, int p_max_size) void print_texeci(struct text_object *obj, char *p, int p_max_size)
{ {
struct execi_data *ed = obj->data.opaque; struct execi_data *ed = (struct execi_data *)obj->data.opaque;
if (!ed) if (!ed)
return; return;
if (!ed->p_timed_thread) { if (!ed->p_timed_thread) {
ed->p_timed_thread = timed_thread_create(&threaded_exec,
(void *) obj, ed->interval * 1000000);
if (!ed->p_timed_thread) {
NORM_ERR("Error creating texeci timed thread");
}
/* /*
* note that we don't register this thread with the * note that we don't register this thread with the
* timed_thread list, because we destroy it manually * timed_thread list, because we destroy it manually
*/ */
if (timed_thread_run(ed->p_timed_thread)) { ed->p_timed_thread = timed_thread::create(std::bind(threaded_exec, std::placeholders::_1, obj), ed->interval * 1000000, false);
NORM_ERR("Error running texeci timed thread"); if (!ed->p_timed_thread) {
NORM_ERR("Error creating texeci timed thread");
} }
} else { } else {
timed_thread_lock(ed->p_timed_thread); std::lock_guard<std::mutex> lock(ed->p_timed_thread->mutex());
snprintf(p, p_max_size, "%s", ed->buffer); snprintf(p, p_max_size, "%s", ed->buffer);
timed_thread_unlock(ed->p_timed_thread);
} }
} }
@ -379,7 +374,7 @@ double execbarval(struct text_object *obj)
double execi_barval(struct text_object *obj) double execi_barval(struct text_object *obj)
{ {
struct execi_data *ed = obj->data.opaque; struct execi_data *ed = (struct execi_data *)obj->data.opaque;
if (!ed) if (!ed)
return 0; return 0;
@ -401,13 +396,14 @@ void free_exec(struct text_object *obj)
void free_execi(struct text_object *obj) void free_execi(struct text_object *obj)
{ {
struct execi_data *ed = obj->data.opaque; struct execi_data *ed = (struct execi_data *)obj->data.opaque;
if (!ed) if (!ed)
return; return;
if (ed->p_timed_thread) if (ed->p_timed_thread) {
timed_thread_destroy(ed->p_timed_thread, &ed->p_timed_thread); ed->p_timed_thread.reset();
}
if (ed->cmd) if (ed->cmd)
free(ed->cmd); free(ed->cmd);
if (ed->buffer) if (ed->buffer)

7
src/exec.h
View File

@ -31,10 +31,6 @@
#ifndef _EXEC_H #ifndef _EXEC_H
#define _EXEC_H #define _EXEC_H
#ifdef __cplusplus
extern "C" {
#endif
extern pid_t childpid; extern pid_t childpid;
void scan_exec_arg(struct text_object *, const char *); void scan_exec_arg(struct text_object *, const char *);
@ -52,8 +48,5 @@ double execbarval(struct text_object *);
double execi_barval(struct text_object *); double execi_barval(struct text_object *);
void free_exec(struct text_object *); void free_exec(struct text_object *);
void free_execi(struct text_object *); void free_execi(struct text_object *);
#ifdef __cplusplus
}
#endif
#endif /* _EXEC_H */ #endif /* _EXEC_H */

6
src/libtcp-portmon.cc
View File

@ -31,7 +31,7 @@
#include <cstdio> #include <cstdio>
#include <cstring> #include <cstring>
#include <vector> #include <vector>
#include <tr1/unordered_map> #include <unordered_map>
/* ------------------------------------------------------------------- /* -------------------------------------------------------------------
* IMPLEMENTATION INTERFACE * IMPLEMENTATION INTERFACE
@ -85,7 +85,7 @@ namespace {
* The second parameter provides the mechanism for removing connections if * The second parameter provides the mechanism for removing connections if
* they are not seen again in subsequent update cycles. * they are not seen again in subsequent update cycles.
* ------------------------------------------------------------------------ */ * ------------------------------------------------------------------------ */
typedef std::tr1::unordered_map<tcp_connection_t, int, tcp_connection_hash> connection_hash_t; typedef std::unordered_map<tcp_connection_t, int, tcp_connection_hash> connection_hash_t;
/* start and end of port monitor range. Set start=end to monitor a single port */ /* start and end of port monitor range. Set start=end to monitor a single port */
typedef std::pair<in_port_t, in_port_t> port_range_t; typedef std::pair<in_port_t, in_port_t> port_range_t;
@ -98,7 +98,7 @@ namespace {
} }
}; };
typedef std::tr1::unordered_map<port_range_t, typedef std::unordered_map<port_range_t,
tcp_port_monitor_t, tcp_port_monitor_t,
port_range_hash> monitor_hash_t; port_range_hash> monitor_hash_t;

129
src/mail.c → src/mail.cc
View File

@ -1,5 +1,5 @@
/* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*- /* -*- mode: c++; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
* vim: ts=4 sw=4 noet ai cindent syntax=c * vim: ts=4 sw=4 noet ai cindent syntax=cpp
* *
* Conky, a system monitor, based on torsmo * Conky, a system monitor, based on torsmo
* *
@ -40,6 +40,7 @@
#include <string.h> #include <string.h>
#include <unistd.h> #include <unistd.h>
#include <limits.h> #include <limits.h>
#include <mutex>
#include <netinet/in.h> #include <netinet/in.h>
#include <netdb.h> #include <netdb.h>
#include <sys/socket.h> #include <sys/socket.h>
@ -75,8 +76,16 @@ struct mail_s { // for imap and pop3
char pass[128]; char pass[128];
char command[1024]; char command[1024];
char folder[128]; char folder[128];
timed_thread *p_timed_thread; timed_thread_ptr p_timed_thread;
char secure; char secure;
mail_s() : unseen(0), messages(0), used(0), quota(0), port(0), retries(0),
interval(0), last_update(0), secure(0) {
host[0] = 0;
user[0] = 0;
pass[0] = 0;
command[0] = 0;
folder[0] = 0;
}
}; };
struct local_mail_s { struct local_mail_s {
@ -361,7 +370,7 @@ void parse_local_mail_args(struct text_object *obj, const char *arg)
variable_substitute(mbox, dst, sizeof(dst)); variable_substitute(mbox, dst, sizeof(dst));
locmail = malloc(sizeof(struct local_mail_s)); locmail = (struct local_mail_s*)malloc(sizeof(struct local_mail_s));
memset(locmail, 0, sizeof(struct local_mail_s)); memset(locmail, 0, sizeof(struct local_mail_s));
locmail->mbox = strndup(dst, text_buffer_size); locmail->mbox = strndup(dst, text_buffer_size);
locmail->interval = n1; locmail->interval = n1;
@ -371,7 +380,7 @@ void parse_local_mail_args(struct text_object *obj, const char *arg)
#define PRINT_MAILS_GENERATOR(x) \ #define PRINT_MAILS_GENERATOR(x) \
void print_##x##mails(struct text_object *obj, char *p, int p_max_size) \ void print_##x##mails(struct text_object *obj, char *p, int p_max_size) \
{ \ { \
struct local_mail_s *locmail = obj->data.opaque; \ struct local_mail_s *locmail = (struct local_mail_s *)obj->data.opaque; \
if (!locmail) \ if (!locmail) \
return; \ return; \
update_mail_count(locmail); \ update_mail_count(locmail); \
@ -393,7 +402,7 @@ PRINT_MAILS_GENERATOR(trashed_)
void free_local_mails(struct text_object *obj) void free_local_mails(struct text_object *obj)
{ {
struct local_mail_s *locmail = obj->data.opaque; struct local_mail_s *locmail = (struct local_mail_s *)obj->data.opaque;
if (!locmail) if (!locmail)
return; return;
@ -411,8 +420,7 @@ struct mail_s *parse_mail_args(char type, const char *arg)
struct mail_s *mail; struct mail_s *mail;
char *tmp; char *tmp;
mail = malloc(sizeof(struct mail_s)); mail = new mail_s;
memset(mail, 0, sizeof(struct mail_s));
if (sscanf(arg, "%128s %128s %128s", mail->host, mail->user, mail->pass) if (sscanf(arg, "%128s %128s %128s", mail->host, mail->user, mail->pass)
!= 3) { != 3) {
@ -439,21 +447,21 @@ struct mail_s *parse_mail_args(char type, const char *arg)
tcsetattr(fp, TCSANOW, &term); tcsetattr(fp, TCSANOW, &term);
} }
// now we check for optional args // now we check for optional args
tmp = strstr(arg, "-r "); tmp = (char*)strstr(arg, "-r ");
if (tmp) { if (tmp) {
tmp += 3; tmp += 3;
sscanf(tmp, "%u", &mail->retries); sscanf(tmp, "%u", &mail->retries);
} else { } else {
mail->retries = 5; // 5 retries after failure mail->retries = 5; // 5 retries after failure
} }
tmp = strstr(arg, "-i "); tmp = (char*)strstr(arg, "-i ");
if (tmp) { if (tmp) {
tmp += 3; tmp += 3;
sscanf(tmp, "%f", &mail->interval); sscanf(tmp, "%f", &mail->interval);
} else { } else {
mail->interval = 300; // 5 minutes mail->interval = 300; // 5 minutes
} }
tmp = strstr(arg, "-p "); tmp = (char*)strstr(arg, "-p ");
if (tmp) { if (tmp) {
tmp += 3; tmp += 3;
sscanf(tmp, "%lu", &mail->port); sscanf(tmp, "%lu", &mail->port);
@ -465,12 +473,12 @@ struct mail_s *parse_mail_args(char type, const char *arg)
} }
} }
if (type == IMAP_TYPE) { if (type == IMAP_TYPE) {
tmp = strstr(arg, "-f "); tmp = (char*)strstr(arg, "-f ");
if (tmp) { if (tmp) {
int len = 1024; int len = 1024;
tmp += 3; tmp += 3;
if (tmp[0] == '\'') { if (tmp[0] == '\'') {
len = strstr(tmp + 1, "'") - tmp - 1; len = (char*)strstr(tmp + 1, "'") - tmp - 1;
if (len > 1024) { if (len > 1024) {
len = 1024; len = 1024;
} }
@ -480,13 +488,13 @@ struct mail_s *parse_mail_args(char type, const char *arg)
strncpy(mail->folder, "INBOX", 128); // default imap inbox strncpy(mail->folder, "INBOX", 128); // default imap inbox
} }
} }
tmp = strstr(arg, "-e "); tmp = (char*)strstr(arg, "-e ");
if (tmp) { if (tmp) {
int len = 1024; int len = 1024;
tmp += 3; tmp += 3;
if (tmp[0] == '\'') { if (tmp[0] == '\'') {
len = strstr(tmp + 1, "'") - tmp - 1; len = (char*)strstr(tmp + 1, "'") - tmp - 1;
if (len > 1024) { if (len > 1024) {
len = 1024; len = 1024;
} }
@ -495,7 +503,6 @@ struct mail_s *parse_mail_args(char type, const char *arg)
} else { } else {
mail->command[0] = '\0'; mail->command[0] = '\0';
} }
mail->p_timed_thread = NULL;
return mail; return mail;
} }
@ -558,11 +565,12 @@ void free_mail_obj(struct text_object *obj)
if (obj->data.opaque == global_mail) { if (obj->data.opaque == global_mail) {
if (--global_mail_use == 0) { if (--global_mail_use == 0) {
free(global_mail); delete global_mail;
global_mail = 0; global_mail = 0;
} }
} else { } else {
free(obj->data.opaque); struct mail_s *mail = (struct mail_s*)obj->data.opaque;
delete mail;
obj->data.opaque = 0; obj->data.opaque = 0;
} }
} }
@ -596,10 +604,10 @@ int imap_command(int sockfd, const char *command, char *response, const char *ve
return 0; return 0;
} }
int imap_check_status(char *recvbuf, struct mail_s *mail) int imap_check_status(char *recvbuf, struct mail_s *mail, thread_handle &handle)
{ {
char *reply; char *reply;
reply = strstr(recvbuf, " (MESSAGES "); reply = (char*)strstr(recvbuf, " (MESSAGES ");
if (!reply || strlen(reply) < 2) { if (!reply || strlen(reply) < 2) {
return -1; return -1;
} }
@ -609,10 +617,9 @@ int imap_check_status(char *recvbuf, struct mail_s *mail)
NORM_ERR("Error parsing IMAP response: %s", recvbuf); NORM_ERR("Error parsing IMAP response: %s", recvbuf);
return -1; return -1;
} else { } else {
timed_thread_lock(mail->p_timed_thread); std::lock_guard<std::mutex> lock(handle.mutex());
sscanf(reply, "MESSAGES %lu UNSEEN %lu", &mail->messages, sscanf(reply, "MESSAGES %lu UNSEEN %lu", &mail->messages,
&mail->unseen); &mail->unseen);
timed_thread_unlock(mail->p_timed_thread);
} }
return 0; return 0;
} }
@ -629,24 +636,18 @@ void imap_unseen_command(struct mail_s *mail, unsigned long old_unseen, unsigned
} }
static void ensure_mail_thread(struct mail_s *mail, static void ensure_mail_thread(struct mail_s *mail,
void *thread(void *), const char *text) const std::function<void(thread_handle &, struct mail_s *mail)> &func, const char *text)
{ {
if (mail->p_timed_thread) if (mail->p_timed_thread)
return; return;
mail->p_timed_thread = timed_thread_create(thread, mail->p_timed_thread = timed_thread::create(std::bind(func, std::placeholders::_1, mail), mail->interval * 1000000);
mail, mail->interval * 1000000);
if (!mail->p_timed_thread) { if (!mail->p_timed_thread) {
NORM_ERR("Error creating %s timed thread", text); NORM_ERR("Error creating %s timed thread", text);
} }
timed_thread_register(mail->p_timed_thread,
&mail->p_timed_thread);
if (timed_thread_run(mail->p_timed_thread)) {
NORM_ERR("Error running %s timed thread", text);
}
} }
static void *imap_thread(void *arg) static void imap_thread(thread_handle &handle, struct mail_s *mail)
{ {
int sockfd, numbytes; int sockfd, numbytes;
char recvbuf[MAXDATASIZE]; char recvbuf[MAXDATASIZE];
@ -657,9 +658,8 @@ static void *imap_thread(void *arg)
struct stat stat_buf; struct stat stat_buf;
struct hostent *he_res = 0; struct hostent *he_res = 0;
struct sockaddr_in their_addr; // connector's address information struct sockaddr_in their_addr; // connector's address information
struct mail_s *mail = (struct mail_s *)arg;
int has_idle = 0; int has_idle = 0;
int threadfd = timed_thread_readfd(mail->p_timed_thread); int threadfd = handle.readfd();
char resolved_host = 0; char resolved_host = 0;
while (fail < mail->retries) { while (fail < mail->retries) {
@ -764,7 +764,7 @@ static void *imap_thread(void *arg)
break; break;
} }
if (imap_check_status(recvbuf, mail)) { if (imap_check_status(recvbuf, mail, handle)) {
fail++; fail++;
break; break;
} }
@ -801,12 +801,12 @@ static void *imap_thread(void *arg)
FD_SET(sockfd, &fdset); FD_SET(sockfd, &fdset);
FD_SET(threadfd, &fdset); FD_SET(threadfd, &fdset);
res = select(MAX(sockfd + 1, threadfd + 1), &fdset, NULL, NULL, &fetchtimeout); res = select(MAX(sockfd + 1, threadfd + 1), &fdset, NULL, NULL, &fetchtimeout);
if (timed_thread_test(mail->p_timed_thread, 1) || (res == -1 && errno == EINTR) || FD_ISSET(threadfd, &fdset)) { if (handle.test(1) || (res == -1 && errno == EINTR) || FD_ISSET(threadfd, &fdset)) {
if ((fstat(sockfd, &stat_buf) == 0) && S_ISSOCK(stat_buf.st_mode)) { if ((fstat(sockfd, &stat_buf) == 0) && S_ISSOCK(stat_buf.st_mode)) {
/* if a valid socket, close it */ /* if a valid socket, close it */
close(sockfd); close(sockfd);
} }
timed_thread_exit(mail->p_timed_thread); return;
} else if (res > 0) { } else if (res > 0) {
if ((numbytes = recv(sockfd, recvbuf, MAXDATASIZE - 1, 0)) == -1) { if ((numbytes = recv(sockfd, recvbuf, MAXDATASIZE - 1, 0)) == -1) {
perror("recv idling"); perror("recv idling");
@ -823,9 +823,9 @@ static void *imap_thread(void *arg)
unsigned long messages, recent = 0; unsigned long messages, recent = 0;
char *buf = recvbuf; char *buf = recvbuf;
char force_check = 0; char force_check = 0;
buf = strstr(buf, "EXISTS"); buf = (char*)strstr(buf, "EXISTS");
while (buf && strlen(buf) > 1 && strstr(buf + 1, "EXISTS")) { while (buf && strlen(buf) > 1 && strstr(buf + 1, "EXISTS")) {
buf = strstr(buf + 1, "EXISTS"); buf = (char*)strstr(buf + 1, "EXISTS");
} }
if (buf) { if (buf) {
// back up until we reach '*' // back up until we reach '*'
@ -833,18 +833,17 @@ static void *imap_thread(void *arg)
buf--; buf--;
} }
if (sscanf(buf, "* %lu EXISTS\r\n", &messages) == 1) { if (sscanf(buf, "* %lu EXISTS\r\n", &messages) == 1) {
timed_thread_lock(mail->p_timed_thread); std::lock_guard<std::mutex> lock(handle.mutex());
if (mail->messages != messages) { if (mail->messages != messages) {
force_check = 1; force_check = 1;
mail->messages = messages; mail->messages = messages;
} }
timed_thread_unlock(mail->p_timed_thread);
} }
} }
buf = recvbuf; buf = recvbuf;
buf = strstr(buf, "RECENT"); buf = (char*)strstr(buf, "RECENT");
while (buf && strlen(buf) > 1 && strstr(buf + 1, "RECENT")) { while (buf && strlen(buf) > 1 && strstr(buf + 1, "RECENT")) {
buf = strstr(buf + 1, "RECENT"); buf = (char*)strstr(buf + 1, "RECENT");
} }
if (buf) { if (buf) {
// back up until we reach '*' // back up until we reach '*'
@ -874,7 +873,7 @@ static void *imap_thread(void *arg)
fail++; fail++;
break; break;
} }
if (imap_check_status(recvbuf, mail)) { if (imap_check_status(recvbuf, mail, handle)) {
fail++; fail++;
break; break;
} }
@ -934,44 +933,41 @@ static void *imap_thread(void *arg)
/* if a valid socket, close it */ /* if a valid socket, close it */
close(sockfd); close(sockfd);
} }
if (timed_thread_test(mail->p_timed_thread, 0)) { if (handle.test(0)) {
timed_thread_exit(mail->p_timed_thread); return;
} }
} }
mail->unseen = 0; mail->unseen = 0;
mail->messages = 0; mail->messages = 0;
return 0;
} }
void print_imap_unseen(struct text_object *obj, char *p, int p_max_size) void print_imap_unseen(struct text_object *obj, char *p, int p_max_size)
{ {
struct mail_s *mail = obj->data.opaque; struct mail_s *mail = (struct mail_s*)obj->data.opaque;
if (!mail) if (!mail)
return; return;
ensure_mail_thread(mail, imap_thread, "imap"); ensure_mail_thread(mail, std::bind(imap_thread, std::placeholders::_1, std::placeholders::_2), "imap");
if (mail && mail->p_timed_thread) { if (mail && mail->p_timed_thread) {
timed_thread_lock(mail->p_timed_thread); std::lock_guard<std::mutex> lock(mail->p_timed_thread->mutex());
snprintf(p, p_max_size, "%lu", mail->unseen); snprintf(p, p_max_size, "%lu", mail->unseen);
timed_thread_unlock(mail->p_timed_thread);
} }
} }
void print_imap_messages(struct text_object *obj, char *p, int p_max_size) void print_imap_messages(struct text_object *obj, char *p, int p_max_size)
{ {
struct mail_s *mail = obj->data.opaque; struct mail_s *mail = (struct mail_s*)obj->data.opaque;
if (!mail) if (!mail)
return; return;
ensure_mail_thread(mail, imap_thread, "imap"); ensure_mail_thread(mail, std::bind(imap_thread, std::placeholders::_1, std::placeholders::_2), "imap");
if (mail && mail->p_timed_thread) { if (mail && mail->p_timed_thread) {
timed_thread_lock(mail->p_timed_thread); std::lock_guard<std::mutex> lock(mail->p_timed_thread->mutex());
snprintf(p, p_max_size, "%lu", mail->messages); snprintf(p, p_max_size, "%lu", mail->messages);
timed_thread_unlock(mail->p_timed_thread);
} }
} }
@ -1003,7 +999,7 @@ int pop3_command(int sockfd, const char *command, char *response, const char *ve
return 0; return 0;
} }
static void *pop3_thread(void *arg) static void pop3_thread(thread_handle &handle, struct mail_s *mail)
{ {
int sockfd, numbytes; int sockfd, numbytes;
char recvbuf[MAXDATASIZE]; char recvbuf[MAXDATASIZE];
@ -1014,7 +1010,6 @@ static void *pop3_thread(void *arg)
struct stat stat_buf; struct stat stat_buf;
struct hostent *he_res = 0; struct hostent *he_res = 0;
struct sockaddr_in their_addr; // connector's address information struct sockaddr_in their_addr; // connector's address information
struct mail_s *mail = (struct mail_s *)arg;
char resolved_host = 0; char resolved_host = 0;
while (fail < mail->retries) { while (fail < mail->retries) {
@ -1121,9 +1116,8 @@ static void *pop3_thread(void *arg)
fail++; fail++;
break; break;
} else { } else {
timed_thread_lock(mail->p_timed_thread); std::lock_guard<std::mutex> lock(handle.mutex());
sscanf(reply, "%lu %lu", &mail->unseen, &mail->used); sscanf(reply, "%lu %lu", &mail->unseen, &mail->used);
timed_thread_unlock(mail->p_timed_thread);
} }
strncpy(sendbuf, "QUIT\r\n", MAXDATASIZE); strncpy(sendbuf, "QUIT\r\n", MAXDATASIZE);
@ -1146,44 +1140,41 @@ static void *pop3_thread(void *arg)
/* if a valid socket, close it */ /* if a valid socket, close it */
close(sockfd); close(sockfd);
} }
if (timed_thread_test(mail->p_timed_thread, 0)) { if (handle.test(0)) {
timed_thread_exit(mail->p_timed_thread); return;
} }
} }
mail->unseen = 0; mail->unseen = 0;
mail->used = 0; mail->used = 0;
return 0;
} }
void print_pop3_unseen(struct text_object *obj, char *p, int p_max_size) void print_pop3_unseen(struct text_object *obj, char *p, int p_max_size)
{ {
struct mail_s *mail = obj->data.opaque; struct mail_s *mail = (struct mail_s *)obj->data.opaque;
if (!mail) if (!mail)
return; return;
ensure_mail_thread(mail, pop3_thread, "pop3"); ensure_mail_thread(mail, std::bind(pop3_thread, std::placeholders::_1, std::placeholders::_2), "pop3");
if (mail && mail->p_timed_thread) { if (mail && mail->p_timed_thread) {
timed_thread_lock(mail->p_timed_thread); std::lock_guard<std::mutex> lock(mail->p_timed_thread->mutex());
snprintf(p, p_max_size, "%lu", mail->unseen); snprintf(p, p_max_size, "%lu", mail->unseen);
timed_thread_unlock(mail->p_timed_thread);
} }
} }
void print_pop3_used(struct text_object *obj, char *p, int p_max_size) void print_pop3_used(struct text_object *obj, char *p, int p_max_size)
{ {
struct mail_s *mail = obj->data.opaque; struct mail_s *mail = (struct mail_s *)obj->data.opaque;
if (!mail) if (!mail)
return; return;
ensure_mail_thread(mail, pop3_thread, "pop3"); ensure_mail_thread(mail, std::bind(pop3_thread, std::placeholders::_1, std::placeholders::_2), "pop3");
if (mail && mail->p_timed_thread) { if (mail && mail->p_timed_thread) {
timed_thread_lock(mail->p_timed_thread); std::lock_guard<std::mutex> lock(mail->p_timed_thread->mutex());
snprintf(p, p_max_size, "%.1f", snprintf(p, p_max_size, "%.1f",
mail->used / 1024.0 / 1024.0); mail->used / 1024.0 / 1024.0);
timed_thread_unlock(mail->p_timed_thread);
} }
} }

8
src/mail.h
View File

@ -3,10 +3,6 @@
#ifndef _MAIL_H #ifndef _MAIL_H
#define _MAIL_H #define _MAIL_H
#ifdef __cplusplus
extern "C" {
#endif
extern char *current_mail_spool; extern char *current_mail_spool;
void parse_local_mail_args(struct text_object *, const char *); void parse_local_mail_args(struct text_object *, const char *);
@ -40,8 +36,4 @@ void print_imap_messages(struct text_object *, char *, int);
void print_pop3_unseen(struct text_object *, char *, int); void print_pop3_unseen(struct text_object *, char *, int);
void print_pop3_used(struct text_object *, char *, int); void print_pop3_used(struct text_object *, char *, int);
#ifdef __cplusplus
}
#endif
#endif /* _MAIL_H */ #endif /* _MAIL_H */

0
src/moc.c → src/moc.cc
View File

8
src/moc.h
View File

@ -23,10 +23,6 @@
#ifndef MOC_H_ #ifndef MOC_H_
#define MOC_H_ #define MOC_H_
#ifdef __cplusplus
extern "C" {
#endif
void update_moc(void); void update_moc(void);
void free_moc(struct text_object *); void free_moc(struct text_object *);
@ -42,9 +38,5 @@ void print_moc_curtime(struct text_object *, char *, int);
void print_moc_bitrate(struct text_object *, char *, int); void print_moc_bitrate(struct text_object *, char *, int);
void print_moc_rate(struct text_object *, char *, int); void print_moc_rate(struct text_object *, char *, int);
#ifdef __cplusplus
}
#endif
#endif /* MOC_H_ */ #endif /* MOC_H_ */

0
src/mpd.c → src/mpd.cc
View File

8
src/mpd.h
View File

@ -3,10 +3,6 @@
#ifndef MPD_H_ #ifndef MPD_H_
#define MPD_H_ #define MPD_H_
#ifdef __cplusplus
extern "C" {
#endif
/* functions for setting the configuration values */ /* functions for setting the configuration values */
void mpd_set_host(const char *); void mpd_set_host(const char *);
void mpd_set_password(const char *, int); void mpd_set_password(const char *, int);
@ -36,8 +32,4 @@ void print_mpd_bitrate(struct text_object *, char *, int);
void print_mpd_status(struct text_object *, char *, int); void print_mpd_status(struct text_object *, char *, int);
int check_mpd_playing(struct text_object *); int check_mpd_playing(struct text_object *);
#ifdef __cplusplus
}
#endif
#endif /*MPD_H_*/ #endif /*MPD_H_*/

320
src/timed_thread.c
View File

@ -1,320 +0,0 @@
/* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
* vim: ts=4 sw=4 noet ai cindent syntax=c
*
* timed_thread.c: Abstraction layer for timed threads
*
* Copyright (C) 2006-2007 Philip Kovacs pkovacs@users.sourceforge.net
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
* USA.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <pthread.h>
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>
#ifndef HAVE_CLOCK_GETTIME
#include <sys/time.h>
#endif
#include "timed_thread.h"
/* Abstraction layer for timed threads */
static int now(struct timespec *);
/* private */
struct _timed_thread {
pthread_t thread; /* thread itself */
pthread_attr_t thread_attr; /* thread attributes */
pthread_mutex_t cs_mutex; /* critical section mutex */
pthread_mutex_t runnable_mutex; /* only for the runnable_cond */
pthread_cond_t runnable_cond; /* signalled to stop the thread */
void *(*start_routine)(void *); /* thread function to run */
void *arg; /* thread function argument */
struct timespec interval_time; /* interval_usecs as a struct timespec */
struct timespec wait_time; /* absolute future time next timed_thread_test will wait until */
int pipefd[2];
int die;
};
/* linked list of created threads */
typedef struct _timed_thread_list {
timed_thread *p_timed_thread;
timed_thread **addr_of_p_timed_thread;
struct _timed_thread_list *next;
} timed_thread_node, timed_thread_list;
static timed_thread_list *p_timed_thread_list_head = NULL;
static timed_thread_list *p_timed_thread_list_tail = NULL;
int timed_thread_readfd(timed_thread *p_timed_thread)
{
return p_timed_thread->pipefd[0];
}
static int now(struct timespec *abstime)
{
#ifndef HAVE_CLOCK_GETTIME
struct timeval tv;
#endif
if (!abstime) {
return -1;
}
#ifdef HAVE_CLOCK_GETTIME
return clock_gettime(CLOCK_REALTIME, abstime);
#else
/* fallback to gettimeofday () */
if (gettimeofday(&tv, NULL) != 0) {
return -1;
}
abstime->tv_sec = tv.tv_sec;
abstime->tv_nsec = tv.tv_usec * 1000;
return 0;
#endif
}
/* create a timed thread (object creation only) */
timed_thread *timed_thread_create(void *start_routine(void *), void *arg,
unsigned int interval_usecs)
{
timed_thread *p_timed_thread;
assert(start_routine != NULL);
assert(interval_usecs >= MINIMUM_INTERVAL_USECS);
if ((p_timed_thread = calloc(sizeof(timed_thread), 1)) == 0) {
return NULL;
}
/* create thread pipe (used to tell threads to die) */
if (pipe(p_timed_thread->pipefd)) {
return NULL;
}
/* init attributes, e.g. joinable thread */
pthread_attr_init(&p_timed_thread->thread_attr);
pthread_attr_setdetachstate(&p_timed_thread->thread_attr,
PTHREAD_CREATE_JOINABLE);
/* init mutexes */
pthread_mutex_init(&p_timed_thread->cs_mutex, NULL);
pthread_mutex_init(&p_timed_thread->runnable_mutex, NULL);
/* init cond */
pthread_cond_init(&p_timed_thread->runnable_cond, NULL);
p_timed_thread->start_routine = start_routine;
p_timed_thread->arg = arg;
/* set wait time to current time */
if (now(&p_timed_thread->wait_time)) {
return NULL;
}
/* seconds portion of the microseconds interval */
p_timed_thread->interval_time.tv_sec = (time_t) (interval_usecs / 1000000);
/* remaining microseconds convert to nanoseconds */
p_timed_thread->interval_time.tv_nsec =
(long) ((interval_usecs % 1000000) * 1000);
/* printf("interval_time.tv_sec = %li, .tv_nsec = %li\n",
p_timed_thread->interval_time.tv_sec,
p_timed_thread->interval_time.tv_nsec); */
return p_timed_thread;
}
/* run a timed thread (drop the thread and run it) */
int timed_thread_run(timed_thread *p_timed_thread)
{
return pthread_create(&p_timed_thread->thread, &p_timed_thread->thread_attr,
p_timed_thread->start_routine, p_timed_thread->arg);
}
/* destroy a timed thread.
* optional addr_of_p_timed_thread to set callers pointer to NULL as a
* convenience. */
void timed_thread_destroy(timed_thread *p_timed_thread,
timed_thread **addr_of_p_timed_thread)
{
assert(p_timed_thread != NULL);
assert((addr_of_p_timed_thread == NULL)
|| (*addr_of_p_timed_thread == p_timed_thread));
/* signal thread to stop */
pthread_mutex_lock(&p_timed_thread->runnable_mutex);
pthread_cond_signal(&p_timed_thread->runnable_cond);
p_timed_thread->die = 1;
pthread_mutex_unlock(&p_timed_thread->runnable_mutex);
if (write(p_timed_thread->pipefd[1], "die", 3) == -1)
perror("write()");
/* join the terminating thread */
if (p_timed_thread->thread) {
pthread_join(p_timed_thread->thread, NULL);
}
/* clean up */
pthread_attr_destroy(&p_timed_thread->thread_attr);
pthread_mutex_destroy(&p_timed_thread->cs_mutex);
pthread_mutex_destroy(&p_timed_thread->runnable_mutex);
pthread_cond_destroy(&p_timed_thread->runnable_cond);
free(p_timed_thread);
if (addr_of_p_timed_thread) {
*addr_of_p_timed_thread = NULL;
}
}
/* lock a timed thread for critical section activity */
int timed_thread_lock(timed_thread *p_timed_thread)
{
assert(p_timed_thread != NULL);
return pthread_mutex_lock(&p_timed_thread->cs_mutex);
}
/* unlock a timed thread after critical section activity */
int timed_thread_unlock(timed_thread *p_timed_thread)
{
assert(p_timed_thread != NULL);
return pthread_mutex_unlock(&p_timed_thread->cs_mutex);
}
/* thread waits interval_usecs for runnable_cond to be signaled.
* returns 1 if signaled, -1 on error, and 0 otherwise.
* caller should call timed_thread_exit() on any non-zero return value. */
int timed_thread_test(timed_thread *p_timed_thread, int override_wait_time)
{
struct timespec now_time;
int rc;
assert(p_timed_thread != NULL);
/* acquire runnable_cond mutex */
if (pthread_mutex_lock(&p_timed_thread->runnable_mutex)) {
/* could not acquire runnable_cond mutex,
* so tell caller to exit thread */
return -1;
}
if (p_timed_thread->die) {
/* if we were kindly asked to die, then die */
return 1;
}
if (override_wait_time && now(&p_timed_thread->wait_time)) {
return -1;
}
/* release mutex and wait until future time for runnable_cond to signal */
rc = pthread_cond_timedwait(&p_timed_thread->runnable_cond,
&p_timed_thread->runnable_mutex, &p_timed_thread->wait_time);
/* mutex re-acquired, so release it */
pthread_mutex_unlock(&p_timed_thread->runnable_mutex);
if (now(&now_time)) {
return -1;
}
if (rc == 0) {
/* runnable_cond was signaled, so tell caller to exit thread */
return 1;
}
/* absolute future time for next pass */
p_timed_thread->wait_time.tv_sec += p_timed_thread->interval_time.tv_sec;
p_timed_thread->wait_time.tv_nsec += p_timed_thread->interval_time.tv_nsec;
p_timed_thread->wait_time.tv_sec += p_timed_thread->wait_time.tv_nsec / 1000000000;
p_timed_thread->wait_time.tv_nsec = p_timed_thread->wait_time.tv_nsec % 1000000000;
/* ensure our future wait time is sane */
if (p_timed_thread->wait_time.tv_sec > (now_time.tv_sec + p_timed_thread->interval_time.tv_sec) || p_timed_thread->wait_time.tv_sec < now_time.tv_sec) {
p_timed_thread->wait_time.tv_sec = now_time.tv_sec + p_timed_thread->interval_time.tv_sec;
p_timed_thread->wait_time.tv_nsec = now_time.tv_nsec + p_timed_thread->interval_time.tv_nsec;
p_timed_thread->wait_time.tv_sec += p_timed_thread->wait_time.tv_nsec / 1000000000;
p_timed_thread->wait_time.tv_nsec = p_timed_thread->wait_time.tv_nsec % 1000000000;
}
/* tell caller not to exit yet */
return 0;
}
/* exit a timed thread */
void timed_thread_exit(timed_thread *p_timed_thread)
{
assert(p_timed_thread != NULL);
close(p_timed_thread->pipefd[0]);
close(p_timed_thread->pipefd[1]);
pthread_exit(NULL);
}
/* register a timed thread for future destruction via
* timed_thread_destroy_registered_threads() */
int timed_thread_register(timed_thread *p_timed_thread,
timed_thread **addr_of_p_timed_thread)
{
timed_thread_node *p_node;
assert((addr_of_p_timed_thread == NULL)
|| (*addr_of_p_timed_thread == p_timed_thread));
if ((p_node = calloc(sizeof(timed_thread_node), 1)) == 0) {
return 0;
}
p_node->p_timed_thread = p_timed_thread;
p_node->addr_of_p_timed_thread = addr_of_p_timed_thread;
p_node->next = NULL;
if (!p_timed_thread_list_tail) {
/* first node of empty list */
p_timed_thread_list_tail = p_node;
p_timed_thread_list_head = p_node;
} else {
/* add node to tail of non-empty list */
p_timed_thread_list_tail->next = p_node;
p_timed_thread_list_tail = p_node;
}
return 0;
}
/* destroy all registered timed threads */
void timed_thread_destroy_registered_threads(void)
{
timed_thread_node *p_node, *p_next;
for (p_node = p_timed_thread_list_head; p_node; p_node = p_next) {
p_next = p_node->next;
timed_thread_destroy(p_node->p_timed_thread,
p_node->addr_of_p_timed_thread);
free(p_node);
p_node = NULL;
}
p_timed_thread_list_head = NULL;
p_timed_thread_list_tail = NULL;
}

274
src/timed_thread.cc Normal file
View File

@ -0,0 +1,274 @@
/* -*- mode: c++; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
* vim: ts=4 sw=4 noet ai cindent syntax=cpp
*
* timed_thread.c: Abstraction layer for timed threads
*
* Copyright (C) 2006-2007 Philip Kovacs pkovacs@users.sourceforge.net
* Copyright (c) 2005-2010 Brenden Matthews, et. al. (see AUTHORS)
* All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
* USA.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <thread>
#include <list>
#include <chrono>
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>
#include "timed_thread.h"
#include "logging.h"
/* Abstraction layer for timed threads */
typedef struct std::chrono::system_clock clk;
/* private */
struct _timed_thread {
std::auto_ptr<std::thread> thread; /* thread itself */
std::mutex cs_mutex; /* critical section mutex */
std::mutex runnable_mutex; /* runnable section mutex */
std::condition_variable runnable_cond; /* signalled to stop the thread */
clk::time_point last_time; /* last time interval */
int pipefd[2];
int die;
};
typedef std::list<timed_thread_ptr> thread_list_t;
thread_list_t thread_list;
/* create a timed thread (object creation only) */
timed_thread::timed_thread(const std::function<void(thread_handle &)> &start_routine, unsigned
int interval_usecs) :
p_timed_thread(new _timed_thread), p_thread_handle(this),
interval_usecs(interval_usecs), running(false)
{
#ifdef DEBUG
assert(interval_usecs >= MINIMUM_INTERVAL_USECS);
#endif /* DEBUG */
/* create thread pipe (used to tell threads to die) */
if (pipe(p_timed_thread->pipefd)) {
throw std::runtime_error("couldn't create pipe");
}
/* set initialize to current time */
p_timed_thread->last_time = clk::now();
/* printf("interval_time.tv_sec = %li, .tv_nsec = %li\n",
p_timed_thread->interval_time.tv_sec,
p_timed_thread->interval_time.tv_nsec); */
p_timed_thread->thread = std::auto_ptr<std::thread>(
new std::thread(start_routine, p_thread_handle)
);
DBGP("created thread %ld", (long)p_timed_thread->thread.get());
running = true;
}
/* destroy a timed thread. */
void timed_thread::destroy(void)
{
DBGP("destroying thread %ld", (long)p_timed_thread->thread.get());
#ifdef DEBUG
assert(running);
#endif /* DEBUG */
{
/* signal thread to stop */
std::lock_guard<std::mutex> l(p_timed_thread->runnable_mutex);
p_timed_thread->runnable_cond.notify_one();
p_timed_thread->die = 1;
}
if (write(p_timed_thread->pipefd[1], "die", 3) == -1)
perror("write()");
/* join the terminating thread */
p_timed_thread->thread->join();
close(p_timed_thread->pipefd[0]);
close(p_timed_thread->pipefd[1]);
deregister(this);
running = false;
}
/* lock a timed thread for critical section activity */
void timed_thread::lock(void)
{
#ifdef DEBUG
assert(running);
#endif /* DEBUG */
p_timed_thread->cs_mutex.lock();
}
/* unlock a timed thread after critical section activity */
void timed_thread::unlock(void)
{
#ifdef DEBUG
assert(running);
#endif /* DEBUG */
p_timed_thread->cs_mutex.unlock();
}
std::mutex &timed_thread::mutex()
{
#ifdef DEBUG
assert(running);
#endif /* DEBUG */
return p_timed_thread->cs_mutex;
}
int timed_thread::readfd(void) const
{
#ifdef DEBUG
assert(running);
#endif /* DEBUG */
return p_timed_thread->pipefd[0];
}
/* thread waits interval_usecs for runnable_cond to be signaled.
* returns 1 if signaled, -1 on error, and 0 otherwise.
* caller should call timed_thread::exit() on any non-zero return value. */
int timed_thread::test(int override_wait_time)
{
#ifdef DEBUG
assert(running);
#endif /* DEBUG */
bool rc = false;
/* determine when to wait until */
#ifdef _GLIBCXX_USE_CLOCK_REALTIME
clk::time_point wait_time = p_timed_thread->last_time +
clk::duration(interval_usecs * 1000);
#elif defined(_GLIBCXX_USE_GETTIMEOFDAY)
clk::time_point wait_time = p_timed_thread->last_time +
clk::duration(interval_usecs);
#else
clk::time_point wait_time = p_timed_thread->last_time +
clk::duration(interval_usecs / 1000000);
#endif
/* acquire runnable_cond mutex */
{
std::unique_lock<std::mutex> lock(p_timed_thread->runnable_mutex);
if (p_timed_thread->die) {
/* if we were kindly asked to die, then die */
return 1;
}
if (override_wait_time) {
wait_time = clk::now();
}
/* release mutex and wait until future time for runnable_cond to signal */
rc = p_timed_thread->runnable_cond.wait_until(lock, wait_time);
}
p_timed_thread->last_time = clk::now();
#ifdef _GLIBCXX_USE_CLOCK_REALTIME
if (wait_time + clk::duration(interval_usecs * 1000) >
p_timed_thread->last_time) {
p_timed_thread->last_time = wait_time;
}
#elif defined(_GLIBCXX_USE_GETTIMEOFDAY)
if (wait_time + clk::duration(interval_usecs) >
p_timed_thread->last_time) {
p_timed_thread->last_time = wait_time;
}
#else
if (wait_time + clk::duration(interval_usecs / 1000000) >
p_timed_thread->last_time) {
p_timed_thread->last_time = wait_time;
}
#endif
/* if runnable_cond was signaled, tell caller to exit thread */
return rc;
}
/* register a timed thread for future destruction via
* timed_thread::destroy_registered_threads() */
int timed_thread::register_(const timed_thread_ptr &timed_thread)
{
thread_list.push_back(timed_thread);
return 0;
}
void timed_thread::deregister(const timed_thread *timed_thread)
{
for (thread_list_t::iterator i = thread_list.begin(); i != thread_list.end(); i++) {
if (i->get() == timed_thread) {
thread_list.erase(i);
break;
}
}
}
/* destroy all registered timed threads */
void timed_thread::destroy_registered_threads(void)
{
for (thread_list_t::iterator i = thread_list.begin(); i != thread_list.end(); i++) {
(*i)->destroy();
#ifdef DEBUG
/* if this assert is ever reached, we have an unreleased shared_ptr
* somewhere holding on to this instance */
assert(i->unique());
#endif /* DEBUG */
}
thread_list.clear(); /* that was easy */
}
int thread_handle::test(int override_wait_time) {
return thread->test(override_wait_time);
}
std::mutex &thread_handle::mutex()
{
#ifdef DEBUG
assert(thread->running);
#endif /* DEBUG */
return thread->p_timed_thread->cs_mutex;
}
void thread_handle::lock(void) {
thread->lock();
}
void thread_handle::unlock(void) {
thread->unlock();
}
int thread_handle::readfd(void) const
{
#ifdef DEBUG
assert(thread->running);
#endif /* DEBUG */
return thread->p_timed_thread->pipefd[0];
}

116
src/timed_thread.h
View File

@ -1,8 +1,11 @@
/* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*- /* -*- mode: c++; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
* vim: ts=4 sw=4 noet ai cindent syntax=cpp
* *
* timed_thread.h: Abstraction layer for timed threads * timed_thread.h: Abstraction layer for timed threads
* *
* Copyright (C) 2006-2007 Philip Kovacs pkovacs@users.sourceforge.net * Copyright (C) 2006-2007 Philip Kovacs pkovacs@users.sourceforge.net
* Copyright (c) 2005-2010 Brenden Matthews, et. al. (see AUTHORS)
* All rights reserved.
* *
* This library is free software; you can redistribute it and/or * This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public * modify it under the terms of the GNU Lesser General Public
@ -23,54 +26,95 @@
#define _TIMED_THREAD_H_ #define _TIMED_THREAD_H_
#include <stdlib.h> #include <stdlib.h>
#include <functional>
#include <memory>
/* 10000 microseconds = 10 ms = 0.01 sec */ /* 10000 microseconds = 10 ms = 0.01 sec */
#define MINIMUM_INTERVAL_USECS 10000 const unsigned int MINIMUM_INTERVAL_USECS = 10000;
#ifdef __cplusplus /* private data */
extern "C" { typedef struct _timed_thread _timed_thread;
#endif
/* opaque structure for clients */ class timed_thread;
typedef struct _timed_thread timed_thread; typedef std::shared_ptr<timed_thread> timed_thread_ptr;
/* create a timed thread (object creation only) */ namespace std { class mutex; }
timed_thread *timed_thread_create(void *start_routine(void *), void *arg,
unsigned int interval_usecs);
/* run a timed thread (drop the thread and run it) */ class thread_handle {
int timed_thread_run(timed_thread *p_timed_thread); /* this class is passed to threaded functions allowing them to control
* specific thread aspects */
public:
virtual ~thread_handle() {}
int test(int override_wait_time);
std::mutex &mutex();
void lock(void);
void unlock(void);
int readfd(void) const;
private:
thread_handle(timed_thread *thread) : thread(thread) {}
friend class timed_thread;
timed_thread *thread;
};
/* destroy a timed thread */ class timed_thread {
void timed_thread_destroy(timed_thread *p_timed_thread, public:
timed_thread **addr_of_p_timed_thread); /* create a timed thread (object creation only) */
static timed_thread_ptr create(const std::function<void(thread_handle &)> &start_routine, const unsigned int
interval_usecs, bool register_for_destruction = true) {
timed_thread_ptr ptr(new timed_thread(std::cref(start_routine), interval_usecs));
if (register_for_destruction) {
register_(ptr);
}
return ptr;
}
/* lock a timed thread for critical section activity */ virtual ~timed_thread(void) {
int timed_thread_lock(timed_thread *p_timed_thread); destroy();
}
/* unlock a timed thread after critical section activity */ /* run a timed thread (drop the thread and run it) */
int timed_thread_unlock(timed_thread *p_timed_thread); int run(void);
/* waits required interval (unless override_wait_time is non-zero) for /* lock a timed thread for critical section activity */
* termination signal returns 1 if received, 0 otherwise. should also return 1 void lock(void);
* if the thread has been asked kindly to die. */
int timed_thread_test(timed_thread *p_timed_thread, int override_wait_time);
/* exit a timed thread */ /* unlock a timed thread after critical section activity */
void timed_thread_exit(timed_thread *p_timed_thread) __attribute__((noreturn)); void unlock(void);
/* register a timed thread for future destruction via /* returns the critical section mutex */
* timed_thread_destroy_registered_threads() */ std::mutex &mutex();
int timed_thread_register(timed_thread *p_timed_thread,
timed_thread **addr_of_p_timed_thread);
/* destroy all registered timed threads */ /* destroy all registered timed threads */
void timed_thread_destroy_registered_threads(void); static void destroy_registered_threads(void);
/* returns read file descriptor for thread pipe */ /* returns read file descriptor for thread pipe */
int timed_thread_readfd(timed_thread *p_timed_thread); int readfd(void) const;
private:
/* create a timed thread (object creation only) */
timed_thread(const std::function<void(thread_handle &)> &start_routine, unsigned int
interval_usecs);
/* waits required interval (unless override_wait_time is non-zero) for
* termination signal returns 1 if received, 0 otherwise. should also return 1
* if the thread has been asked kindly to die. */
int test(int override_wait_time);
/* destroy a timed thread */
void destroy(void);
/* register a timed thread for destruction */
static int register_(const timed_thread_ptr &timed_thread);
/* de-register a timed thread for destruction */
static void deregister(const timed_thread *timed_thread);
/* private internal data */
std::auto_ptr<_timed_thread> p_timed_thread;
thread_handle p_thread_handle;
unsigned int interval_usecs;
bool running;
friend class thread_handle;
};
#ifdef __cplusplus
}
#endif
#endif /* #ifdef _TIMED_THREAD_H_ */ #endif /* #ifdef _TIMED_THREAD_H_ */