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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
View File

@ -231,6 +231,7 @@ Advanced options (experts only):
--disable-vis disable VIS optimizations --disable-vis disable VIS optimizations
--disable-yasm disable use of yasm assembler --disable-yasm disable use of yasm assembler
--enable-pic build position-independent code --enable-pic build position-independent code
--malloc-prefix=PFX prefix malloc and related names with PFX
Developer options (useful when working on FFmpeg itself): Developer options (useful when working on FFmpeg itself):
--disable-debug disable debugging symbols --disable-debug disable debugging symbols
@ -1108,6 +1109,7 @@ CMDLINE_SET="
host_os host_os
ld ld
logfile logfile
malloc_prefix
nm nm
source_path source_path
sysinclude sysinclude
@ -2438,9 +2440,9 @@ check_func gethrtime
check_func getrusage check_func getrusage
check_func inet_aton $network_extralibs check_func inet_aton $network_extralibs
check_func isatty check_func isatty
check_func memalign check_func ${malloc_prefix}memalign && enable memalign
check_func mkstemp 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 io.h setmode
check_func_headers lzo/lzo1x.h lzo1x_999_compress check_func_headers lzo/lzo1x.h lzo1x_999_compress
check_func_headers windows.h GetProcessTimes check_func_headers windows.h GetProcessTimes
@ -2978,6 +2980,9 @@ cat > $TMPH <<EOF
#define EXTERN_ASM ${extern_prefix} #define EXTERN_ASM ${extern_prefix}
EOF EOF
test -n "$malloc_prefix" &&
echo "#define MALLOC_PREFIX $malloc_prefix" >>$TMPH
if enabled small || disabled optimizations; then if enabled small || disabled optimizations; then
echo "#define av_always_inline" >> $TMPH echo "#define av_always_inline" >> $TMPH
fi fi

17
libavutil/mem.c
View File

@ -33,6 +33,7 @@
#include <malloc.h> #include <malloc.h>
#endif #endif
#include "avutil.h"
#include "mem.h" #include "mem.h"
/* here we can use OS-dependent allocation functions */ /* here we can use OS-dependent allocation functions */
@ -40,6 +41,22 @@
#undef malloc #undef malloc
#undef realloc #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 /* 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 memory allocator. You do not need to suppress this file because the
linker will do it automatically. */ linker will do it automatically. */