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Code Issues Releases Activity

Drop memalign hack

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It no longer serves a useful purpose.
This commit is contained in:
Diego Biurrun 2016-03-24 20:55:19 +01:00
parent f01f7a7846
commit 4fb311c804
2 changed files with 3 additions and 33 deletions
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7
configure vendored
View File

@ -294,7 +294,6 @@ Advanced options (experts only):
--disable-safe-bitstream-reader
disable buffer boundary checking in bitreaders
(faster, but may crash)
--enable-memalign-hack emulate memalign, interferes with memory debuggers
--enable-sram allow use of on-chip SRAM
Optimization options (experts only):
@ -1354,7 +1353,6 @@ CONFIG_LIST="
$LIBRARY_LIST
$PROGRAM_LIST
$SUBSYSTEM_LIST
memalign_hack
neon_clobber_test
pic
pod2man
@ -1471,7 +1469,6 @@ ARCH_FEATURES="
local_aligned_8
local_aligned_16
local_aligned_32
simd_align
simd_align_16
simd_align_32
"
@ -1884,7 +1881,6 @@ aligned_stack_if_any="aarch64 ppc x86"
fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
fast_unaligned_if_any="aarch64 ppc x86"
simd_align_if_any="simd_align_16 simd_align_32"
simd_align_16_if_any="altivec neon sse"
simd_align_32_if_any="avx"
@ -5041,9 +5037,6 @@ enabled_all dxva2 CoTaskMemFree &&
prepend avconv_libs $($ldflags_filter "-lole32") &&
enable dxva2_lib
! enabled_any memalign posix_memalign aligned_malloc &&
enabled simd_align && enable memalign_hack
map 'enabled $v && intrinsics=${v#intrinsics_}' $INTRINSICS_LIST
for thread in $THREADS_LIST; do

29
libavutil/mem.c
View File

@ -62,22 +62,12 @@ void free(void *ptr);
void *av_malloc(size_t size)
{
void *ptr = NULL;
#if CONFIG_MEMALIGN_HACK
long diff;
#endif
/* let's disallow possibly ambiguous cases */
if (size > (INT_MAX - 32) || !size)
return NULL;
#if CONFIG_MEMALIGN_HACK
ptr = malloc(size + 32);
if (!ptr)
return ptr;
diff = ((-(long)ptr - 1) & 31) + 1;
ptr = (char *)ptr + diff;
((char *)ptr)[-1] = diff;
#elif HAVE_POSIX_MEMALIGN
#if HAVE_POSIX_MEMALIGN
if (posix_memalign(&ptr, 32, size))
ptr = NULL;
#elif HAVE_ALIGNED_MALLOC
@ -116,21 +106,11 @@ void *av_malloc(size_t size)
void *av_realloc(void *ptr, size_t size)
{
#if CONFIG_MEMALIGN_HACK
int diff;
#endif
/* let's disallow possibly ambiguous cases */
if (size > (INT_MAX - 16))
return NULL;
#if CONFIG_MEMALIGN_HACK
//FIXME this isn't aligned correctly, though it probably isn't needed
if (!ptr)
return av_malloc(size);
diff = ((char *)ptr)[-1];
return (char *)realloc((char *)ptr - diff, size + diff) + diff;
#elif HAVE_ALIGNED_MALLOC
#if HAVE_ALIGNED_MALLOC
return _aligned_realloc(ptr, size, 32);
#else
return realloc(ptr, size);
@ -189,10 +169,7 @@ int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
void av_free(void *ptr)
{
#if CONFIG_MEMALIGN_HACK
if (ptr)
free((char *)ptr - ((char *)ptr)[-1]);
#elif HAVE_ALIGNED_MALLOC
#if HAVE_ALIGNED_MALLOC
_aligned_free(ptr);
#else
free(ptr);