72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/*
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* s3fs - FUSE-based file system backed by Amazon S3
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*
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* Copyright(C) 2007 Randy Rizun <rrizun@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef S3FS_S3FS_H_
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#define S3FS_S3FS_H_
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#define FUSE_USE_VERSION 26
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#include <fuse.h>
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#define S3FS_FUSE_EXIT() \
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do{ \
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struct fuse_context* pcxt = fuse_get_context(); \
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if(pcxt){ \
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fuse_exit(pcxt->fuse); \
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} \
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}while(0)
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// [NOTE]
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// s3fs use many small allocated chunk in heap area for stats
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// cache and parsing xml, etc. The OS may decide that giving
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// this little memory back to the kernel will cause too much
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// overhead and delay the operation.
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// Address of gratitude, this workaround quotes a document of
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// libxml2.( http://xmlsoft.org/xmlmem.html )
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//
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// When valgrind is used to test memory leak of s3fs, a large
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// amount of chunk may be reported. You can check the memory
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// release accurately by defining the S3FS_MALLOC_TRIM flag
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// and building it. Also, when executing s3fs, you can define
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// the MMAP_THRESHOLD environment variable and check more
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// accurate memory leak.( see, man 3 free )
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//
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#ifdef S3FS_MALLOC_TRIM
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#ifdef HAVE_MALLOC_TRIM
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#include <malloc.h>
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#define S3FS_MALLOCTRIM(pad) malloc_trim(pad)
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#else // HAVE_MALLOC_TRIM
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#define S3FS_MALLOCTRIM(pad)
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#endif // HAVE_MALLOC_TRIM
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#else // S3FS_MALLOC_TRIM
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#define S3FS_MALLOCTRIM(pad)
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#endif // S3FS_MALLOC_TRIM
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#endif // S3FS_S3FS_H_
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: expandtab sw=4 ts=4 fdm=marker
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* vim<600: expandtab sw=4 ts=4
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*/
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