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Add --malloc-prefix to apply a prefix to malloc, free etc

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This makes it easy to use a replacement allocator instead of the
system default one.

Originally committed as revision 21509 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-01-28 13:06:31 +00:00
parent e9ca315dd1
commit 4ae406856f
2 changed files with 24 additions and 2 deletions
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9
configure vendored
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@ -231,6 +231,7 @@ Advanced options (experts only):
--disable-vis disable VIS optimizations
--disable-yasm disable use of yasm assembler
--enable-pic build position-independent code
--malloc-prefix=PFX prefix malloc and related names with PFX
Developer options (useful when working on FFmpeg itself):
--disable-debug disable debugging symbols
@ -1108,6 +1109,7 @@ CMDLINE_SET="
host_os
ld
logfile
malloc_prefix
nm
source_path
sysinclude
@ -2438,9 +2440,9 @@ check_func gethrtime
check_func getrusage
check_func inet_aton $network_extralibs
check_func isatty
check_func memalign
check_func ${malloc_prefix}memalign && enable memalign
check_func mkstemp
check_func posix_memalign
check_func ${malloc_prefix}posix_memalign && enable posix_memalign
check_func_headers io.h setmode
check_func_headers lzo/lzo1x.h lzo1x_999_compress
check_func_headers windows.h GetProcessTimes
@ -2978,6 +2980,9 @@ cat > $TMPH <<EOF
#define EXTERN_ASM ${extern_prefix}
EOF
test -n "$malloc_prefix" &&
echo "#define MALLOC_PREFIX $malloc_prefix" >>$TMPH
if enabled small || disabled optimizations; then
echo "#define av_always_inline" >> $TMPH
fi

17
libavutil/mem.c
View File

@ -33,6 +33,7 @@
#include <malloc.h>
#endif
#include "avutil.h"
#include "mem.h"
/* here we can use OS-dependent allocation functions */
@ -40,6 +41,22 @@
#undef malloc
#undef realloc
#ifdef MALLOC_PREFIX
#define malloc AV_JOIN(MALLOC_PREFIX, malloc)
#define memalign AV_JOIN(MALLOC_PREFIX, memalign)
#define posix_memalign AV_JOIN(MALLOC_PREFIX, posix_memalign)
#define realloc AV_JOIN(MALLOC_PREFIX, realloc)
#define free AV_JOIN(MALLOC_PREFIX, free)
void *malloc(size_t size);
void *memalign(size_t align, size_t size);
int posix_memalign(void **ptr, size_t align, size_t size);
void *realloc(void *ptr, size_t size);
void free(void *ptr);
#endif /* MALLOC_PREFIX */
/* You can redefine av_malloc and av_free in your project to use your
memory allocator. You do not need to suppress this file because the
linker will do it automatically. */