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/*
* s3fs - FUSE-based file system backed by Amazon S3
*
* Copyright(C) 2007 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
static const int64_t FIVE_GB = 5LL * 1024LL * 1024LL * 1024LL;
#include <fuse.h>
#define S3FS_FUSE_EXIT() \
do{ \
struct fuse_context* pcxt = fuse_get_context(); \
if(pcxt){ \
fuse_exit(pcxt->fuse); \
} \
}while(0)
// [NOTE]
// 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.
// Address of gratitude, this workaround quotes a document of
// libxml2.( http://xmlsoft.org/xmlmem.html )
//
// When valgrind is used to test memory leak of s3fs, a large
// amount of chunk may be reported. You can check the memory
// release accurately by defining the S3FS_MALLOC_TRIM flag
// and building it. Also, when executing s3fs, you can define
// the MMAP_THRESHOLD environment variable and check more
// accurate memory leak.( see, man 3 free )
//
#ifdef S3FS_MALLOC_TRIM
#ifdef HAVE_MALLOC_TRIM
#include <malloc.h>
#define S3FS_MALLOCTRIM(pad) malloc_trim(pad)
#else // HAVE_MALLOC_TRIM
#define S3FS_MALLOCTRIM(pad)
#endif // HAVE_MALLOC_TRIM
#else // S3FS_MALLOC_TRIM
#define S3FS_MALLOCTRIM(pad)
#endif // S3FS_MALLOC_TRIM
#define S3FS_XMLFREEDOC(doc) \
do{ \
xmlFreeDoc(doc); \
S3FS_MALLOCTRIM(0); \
}while(0)
#define S3FS_XMLFREE(ptr) \
do{ \
xmlFree(ptr); \
S3FS_MALLOCTRIM(0); \
}while(0)
#define S3FS_XMLXPATHFREECONTEXT(ctx) \
do{ \
xmlXPathFreeContext(ctx); \
S3FS_MALLOCTRIM(0); \
}while(0)
#define S3FS_XMLXPATHFREEOBJECT(obj) \
do{ \
xmlXPathFreeObject(obj); \
S3FS_MALLOCTRIM(0); \
}while(0)
#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
*/
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