s3fs-fuse/src/s3fs.h
2014-09-07 15:08:27 +00:00

99 lines
2.8 KiB
C

/*
* s3fs - FUSE-based file system backed by Amazon S3
*
* Copyright 2007-2008 Randy Rizun <rrizun@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef S3FS_S3_H_
#define S3FS_S3_H_
#define FUSE_USE_VERSION 26
#define FIVE_GB 5368709120LL
#include <fuse.h>
#define S3FS_FUSE_EXIT() { \
struct fuse_context* pcxt = fuse_get_context(); \
if(pcxt){ \
fuse_exit(pcxt->fuse); \
} \
}
//
// s3fs use many small allocated chunk in heap area for
// stats cache and parsing xml, etc. The OS may decide
// that giving this little memory back to the kernel
// will cause too much overhead and delay the operation.
// So s3fs calls malloc_trim function to really get the
// memory back. Following macros is prepared for that
// your system does not have it.
//
// Address of gratitude, this workaround quotes a document
// of libxml2.
// http://xmlsoft.org/xmlmem.html
//
#ifdef HAVE_MALLOC_TRIM
#include <malloc.h>
#define DISPWARN_MALLOCTRIM(str)
#define S3FS_MALLOCTRIM(pad) malloc_trim(pad)
#define S3FS_XMLFREEDOC(doc) \
{ \
xmlFreeDoc(doc); \
S3FS_MALLOCTRIM(0); \
}
#define S3FS_XMLFREE(ptr) \
{ \
xmlFree(ptr); \
S3FS_MALLOCTRIM(0); \
}
#define S3FS_XMLXPATHFREECONTEXT(ctx) \
{ \
xmlXPathFreeContext(ctx); \
S3FS_MALLOCTRIM(0); \
}
#define S3FS_XMLXPATHFREEOBJECT(obj) \
{ \
xmlXPathFreeObject(obj); \
S3FS_MALLOCTRIM(0); \
}
#else // HAVE_MALLOC_TRIM
#define DISPWARN_MALLOCTRIM(str) \
fprintf(stderr, "Warning: %s without malloc_trim is possibility of the use memory increase.\n", program_name.c_str())
#define S3FS_MALLOCTRIM(pad)
#define S3FS_XMLFREEDOC(doc) xmlFreeDoc(doc)
#define S3FS_XMLFREE(ptr) xmlFree(ptr)
#define S3FS_XMLXPATHFREECONTEXT(ctx) xmlXPathFreeContext(ctx)
#define S3FS_XMLXPATHFREEOBJECT(obj) xmlXPathFreeObject(obj)
#endif // HAVE_MALLOC_TRIM
char* get_object_sseckey_md5(const char* path);
#endif // S3FS_S3_H_
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4 fdm=marker
* vim<600: noet sw=4 ts=4
*/