mirror of
https://github.com/octoleo/lsyncd.git
synced 2024-12-12 14:17:47 +00:00
timestamps / jiffies are now easier to handle in Lua as userdata */
This commit is contained in:
parent
19c697b28d
commit
80d55b0708
@ -221,7 +221,7 @@ handle_event(lua_State *L,
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lua_pushnumber(L, move_event_buf->wd);
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}
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lua_pushboolean(L, (event->mask & IN_ISDIR) != 0);
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lua_pushinteger(L, times(NULL));
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l_now(L);
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if (event_type == MOVE) {
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lua_pushstring(L, move_event_buf->name);
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lua_pushnumber(L, event->wd);
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237
lsyncd.c
237
lsyncd.c
@ -485,6 +485,7 @@ write_pidfile(lua_State *L, const char *pidfile) {
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static int l_stackdump(lua_State* L);
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/**
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* Logs a message.
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*
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@ -527,6 +528,16 @@ l_log(lua_State *L)
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}
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lua_replace(L, i);
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break;
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case LUA_TUSERDATA:
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{
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clock_t *c = (clock_t *)
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luaL_checkudata(L, i, "Lsyncd.jiffies");
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double d = (*c);
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d /= clocks_per_sec;
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lua_pushfstring(L, "(Timestamp: %f)", d);
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lua_replace(L, i);
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break;
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}
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case LUA_TNIL:
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lua_pushstring(L, "(nil)");
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lua_replace(L, i);
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@ -543,80 +554,20 @@ l_log(lua_State *L)
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return 0;
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}
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/**
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* Returns (on Lua stack) true if time1 is earler than time2
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* @param (on Lua Stack) time1
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* @param (on Lua Stack) time2
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* @return the true if time1 < time2
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*/
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static int
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l_clockbefore(lua_State *L)
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{
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clock_t t1 = (clock_t) luaL_checkinteger(L, 1);
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clock_t t2 = (clock_t) luaL_checkinteger(L, 2);
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lua_pushboolean(L, time_before(t1, t2));
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return 1;
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}
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/**
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* Returns (on Lua stack) true if time1 is earler or eq to time2
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* @param (on Lua Stack) time1
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* @param (on Lua Stack) time2
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* @return the true if time1 <= time2
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*/
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static int
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l_clockbeforeq(lua_State *L)
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{
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clock_t t1 = (clock_t) luaL_checkinteger(L, 1);
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clock_t t2 = (clock_t) luaL_checkinteger(L, 2);
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lua_pushboolean(L, time_before_eq(t1, t2));
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return 1;
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}
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/**
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* Returns (on Lua stack) the earlier or two clock times.
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*
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* @param (on Lua Stack) time1
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* @param (on Lua Stack) time2
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* @return the earlier time
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*/
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static int
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l_earlier(lua_State *L)
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{
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clock_t t1 = (clock_t) luaL_checkinteger(L, 1);
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clock_t t2 = (clock_t) luaL_checkinteger(L, 2);
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lua_pushinteger(L, time_before(t1, t2) ? t1 : t2);
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return 1;
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}
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/**
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* Returns (on Lua stack) the current kernels
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* clock state (jiffies)
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*/
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static int
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extern int
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l_now(lua_State *L)
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{
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lua_pushinteger(L, times(NULL));
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clock_t *j = lua_newuserdata(L, sizeof(clock_t));
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luaL_getmetatable(L, "Lsyncd.jiffies");
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lua_setmetatable(L, -2);
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*j = times(NULL);
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return 1;
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}
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/**
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* Returns (on Lua stack) the addition of a clock timer by seconds.
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*
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* @param1 (Lua stack) the clock timer
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* @param2 (Lua stack) seconds to change clock.
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*
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* @return (Lua stack) clock timer + seconds.
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*/
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static int
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l_addtoclock(lua_State *L)
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{
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clock_t c1 = luaL_checkinteger(L, 1);
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clock_t c2 = luaL_checkinteger(L, 2);
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lua_pop(L, 2);
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lua_pushinteger(L, c1 + c2 * clocks_per_sec);
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return 1;
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}
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/**
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* Executes a subprocess. Does not wait for it to return.
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@ -955,13 +906,8 @@ l_configure(lua_State *L)
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return 0;
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}
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static const luaL_reg lsyncdlib[] = {
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{"addtoclock", l_addtoclock },
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{"clockbefore", l_clockbefore },
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{"clockbeforeq", l_clockbeforeq },
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{"configure", l_configure },
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{"earlier", l_earlier },
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{"exec", l_exec },
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{"log", l_log },
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{"now", l_now },
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@ -972,6 +918,127 @@ static const luaL_reg lsyncdlib[] = {
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{NULL, NULL}
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};
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/**
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* Adds two jiffies or a number to a jiffy
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*/
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static int
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l_jiffies_add(lua_State *L)
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{
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clock_t *p1 = (clock_t *) lua_touserdata(L, 1);
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clock_t *p2 = (clock_t *) lua_touserdata(L, 2);
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clock_t a1 = p1 ? *p1 : luaL_checknumber(L, 1) * clocks_per_sec;
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clock_t a2 = p2 ? *p2 : luaL_checknumber(L, 2) * clocks_per_sec;
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clock_t *r = (clock_t *) lua_newuserdata(L, sizeof(clock_t));
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luaL_getmetatable(L, "Lsyncd.jiffies");
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lua_setmetatable(L, -2);
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*r = a1 + a2;
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return 1;
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}
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/**
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* Adds two jiffies or a number to a jiffy
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*/
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static int
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l_jiffies_sub(lua_State *L)
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{
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clock_t *p1 = (clock_t *) lua_touserdata(L, 1);
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clock_t *p2 = (clock_t *) lua_touserdata(L, 2);
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clock_t a1 = p1 ? *p1 : luaL_checknumber(L, 1) * clocks_per_sec;
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clock_t a2 = p2 ? *p2 : luaL_checknumber(L, 2) * clocks_per_sec;
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clock_t *r = (clock_t *) lua_newuserdata(L, sizeof(clock_t));
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luaL_getmetatable(L, "Lsyncd.jiffies");
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lua_setmetatable(L, -2);
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*r = a1 - a2;
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return 1;
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}
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/**
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* Substracts two jiffies or a number to a jiffy
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*/
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static int
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l_jiffies_eq(lua_State *L)
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{
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clock_t a1 = (*(clock_t *) luaL_checkudata(L, 1, "Lsyncd.jiffies"));
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clock_t a2 = (*(clock_t *) luaL_checkudata(L, 2, "Lsyncd.jiffies"));
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lua_pushboolean(L, a1 == a2);
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return 1;
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}
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/**
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* True if jiffy1 before jiffy2
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*/
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static int
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l_jiffies_lt(lua_State *L)
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{
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clock_t a1 = (*(clock_t *) luaL_checkudata(L, 1, "Lsyncd.jiffies"));
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clock_t a2 = (*(clock_t *) luaL_checkudata(L, 2, "Lsyncd.jiffies"));
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lua_pushboolean(L, time_before(a1, a2));
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return 1;
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}
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/**
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* True if jiffy1 before or == jiffy2
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*/
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static int
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l_jiffies_le(lua_State *L)
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{
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clock_t a1 = (*(clock_t *) luaL_checkudata(L, 1, "Lsyncd.jiffies"));
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clock_t a2 = (*(clock_t *) luaL_checkudata(L, 2, "Lsyncd.jiffies"));
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lua_pushboolean(L, (a1 == a2) || time_before(a1, a2));
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return 1;
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}
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/**
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* Registers the lsyncd lib
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*/
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void
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register_lsyncd(lua_State *L)
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{
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luaL_register(L, "lsyncd", lsyncdlib);
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lua_setglobal(L, "lysncd");
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/* creates the metatable for jiffies userdata */
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luaL_newmetatable(L, "Lsyncd.jiffies");
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lua_pushstring(L, "__add");
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lua_pushcfunction(L, l_jiffies_add);
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lua_settable(L, -3);
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lua_pushstring(L, "__sub");
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lua_pushcfunction(L, l_jiffies_sub);
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lua_settable(L, -3);
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lua_pushstring(L, "__lt");
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lua_pushcfunction(L, l_jiffies_lt);
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lua_settable(L, -3);
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lua_pushstring(L, "__le");
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lua_pushcfunction(L, l_jiffies_le);
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lua_settable(L, -3);
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lua_pushstring(L, "__eq");
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lua_pushcfunction(L, l_jiffies_eq);
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lua_settable(L, -3);
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lua_pop(L, 1);
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lua_getglobal(L, "lysncd");
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#ifdef LSYNCD_WITH_INOTIFY
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register_inotify(L);
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lua_settable(L, -3);
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#endif
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#ifdef LSYNCD_WITH_FSEVENTS
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register_fsevents(L);
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lua_settable(L, -3);
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#endif
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lua_pop(L, 1);
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if (lua_gettop(L)) {
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logstring("Error", "internal, stack not empty in lsyncd_register()");
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exit(-1); // ERRNO
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}
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}
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/*****************************************************************************
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* Lsyncd Core
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****************************************************************************/
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@ -1145,16 +1212,18 @@ masterloop(lua_State *L)
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have_alarm = lua_toboolean(L, -1);
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} else {
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have_alarm = true;
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alarm_time = (clock_t) luaL_checkinteger(L, -1);
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alarm_time =
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*((clock_t *) luaL_checkudata(L, -1, "Lsyncd.jiffies"));
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}
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lua_pop(L, 2);
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if (have_alarm && time_before_eq(alarm_time, now)) {
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/* there is a delay that wants to be handled already thus instead of
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* reading/writing from observances it jumps directly to handling */
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/* there is a delay that wants to be handled already thus instead
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* of reading/writing from observances it jumps directly to
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* handling */
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// TODO: Actually it might be smarter to handler observances eitherway.
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// since event queues might overflow.
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// TODO: Actually it might be smarter to handler observances
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// eitherway. since event queues might overflow.
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logstring("Masterloop", "immediately handling delays.");
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} else {
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/* use select() to determine what happens next
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@ -1164,6 +1233,7 @@ masterloop(lua_State *L)
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struct timespec tv;
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if (have_alarm) {
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// TODO use trunc instead of long converstions
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double d = ((double)(alarm_time - now)) / clocks_per_sec;
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tv.tv_sec = d;
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tv.tv_nsec = ((d - (long) d)) * 1000000000.0;
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@ -1274,7 +1344,7 @@ masterloop(lua_State *L)
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/* lets the runner do stuff every cycle,
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* like starting new processes, writing the statusfile etc. */
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load_runner_func(L, "cycle");
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lua_pushinteger(L, times(NULL));
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l_now(L);
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if (lua_pcall(L, 1, 1, -3)) {
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exit(-1); // ERRNO
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}
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@ -1343,19 +1413,7 @@ main1(int argc, char *argv[])
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}
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/* registers lsycnd core */
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luaL_register(L, "lsyncd", lsyncdlib);
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lua_setglobal(L, "lysncd");
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lua_getglobal(L, "lysncd");
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#ifdef LSYNCD_WITH_INOTIFY
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register_inotify(L);
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lua_settable(L, -3);
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#endif
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#ifdef LSYNCD_WITH_FSEVENTS
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register_fsevents(L);
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lua_settable(L, -3);
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#endif
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lua_pop(L, 1);
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register_lsyncd(L);
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if (check_logcat("Debug") >= settings.log_level) {
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/* printlogf doesnt support %ld :-( */
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@ -1556,7 +1614,6 @@ main1(int argc, char *argv[])
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}
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{
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int idx = 0;
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/* runs initialitions from runner
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* lua code will set configuration and add watches */
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load_runner_func(L, "initialize");
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2
lsyncd.h
2
lsyncd.h
@ -50,6 +50,8 @@ extern struct settings {
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#define time_after_eq(a,b) ((long)(a) - (long)(b) >= 0)
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#define time_before_eq(a,b) time_after_eq(b,a)
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/* returns (on Lua stack) the current kernels * clock state (jiffies) */
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extern int l_now(lua_State *L);
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/* pushes a runner function and the runner error handler onto Lua stack */
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extern void load_runner_func(lua_State *L, const char *name);
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23
lsyncd.lua
23
lsyncd.lua
@ -1087,7 +1087,7 @@ local Sync = (function()
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if alarm < 1 then
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alarm = 1
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end
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delay.alarm = lsyncd.addtoclock(lsyncd.now(), alarm)
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delay.alarm = lsyncd.now() + alarm
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end
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else
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log("Delay", "collected a list")
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@ -1105,7 +1105,7 @@ local Sync = (function()
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if alarm < 1 then
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alarm = 1
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end
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alarm = lsyncd.addtoclock(lsyncd.now(), alarm)
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alarm = lsyncd.now() + alarm
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for k, d in pairs(delay) do
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if type(k) == "number" then
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d.alarm = alarm
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@ -1194,7 +1194,7 @@ local Sync = (function()
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-- creates the new action
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local alarm
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if time and self.config.delay then
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alarm = lsyncd.addtoclock(time, self.config.delay)
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alarm = time + self.config.delay
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else
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alarm = lsyncd.now()
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end
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@ -1324,7 +1324,7 @@ local Sync = (function()
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if #self.delays < self.config.maxDelays then
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-- time constrains only are only a concern if not maxed
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-- the delay FIFO already.
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if d.alarm ~= true and lsyncd.clockbefore(now, d.alarm) then
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if d.alarm ~= true and now < d.alarm then
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-- reached point in stack where delays are in future
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return
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end
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@ -1349,7 +1349,7 @@ local Sync = (function()
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if #self.delays < self.config.maxDelays then
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-- time constrains only are only a concern if not maxed
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-- the delay FIFO already.
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if d.alarm ~= true and lsyncd.clockbefore(now, d.alarm) then
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if d.alarm ~= true and now < d.alarm then
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-- reached point in stack where delays are in future
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return nil
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end
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@ -2183,15 +2183,15 @@ local StatusFile = (function()
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-- some logic to not write too often
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if settings.statusIntervall > 0 then
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-- already waiting
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if alarm and lsyncd.clockbefore(now, alarm) then
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if alarm and now < alarm then
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log("Statusfile", "waiting(",now," < ",alarm,")")
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return
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end
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-- determines when a next write will be possible
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if not alarm then
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local nextWrite = lastWritten and
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lsyncd.addtoclock(now, settings.statusIntervall)
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if nextWrite and lsyncd.clockbefore(now, nextWrite) then
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local nextWrite =
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lastWritten and now + settings.statusIntervall
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if nextWrite and now < nextWrite then
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log("Statusfile", "setting alarm: ", nextWrite)
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alarm = nextWrite
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return
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@ -2602,7 +2602,10 @@ function runner.getAlarm()
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if not alarm then
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alarm = a
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else
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alarm = lsyncd.earlier(alarm, a)
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-- the earlier time
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if a < alarm then
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alarm = a
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end
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end
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end
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