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Code Issues Releases Activity

avcodec/parser: use a mutex instead of atomics in av_register_codec_parser()

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Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer
2018-01-04 15:11:32 -03:00
parent f528c49c7c
commit d36335bda5
1 changed files with 7 additions and 4 deletions
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11
libavcodec/parser.c
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@@ -25,9 +25,9 @@
#include <string.h> #include <string.h>
#include "libavutil/avassert.h" #include "libavutil/avassert.h"
#include "libavutil/atomic.h"
#include "libavutil/internal.h" #include "libavutil/internal.h"
#include "libavutil/mem.h" #include "libavutil/mem.h"
#include "libavutil/thread.h"
#include "internal.h" #include "internal.h"
#include "parser.h" #include "parser.h"
@@ -42,11 +42,14 @@ AVCodecParser *av_parser_next(const AVCodecParser *p)
return av_first_parser; return av_first_parser;
} }
static AVMutex parser_register_mutex = AV_MUTEX_INITIALIZER;
void av_register_codec_parser(AVCodecParser *parser) void av_register_codec_parser(AVCodecParser *parser)
{ {
do { ff_mutex_lock(&parser_register_mutex);
parser->next = av_first_parser; parser->next = av_first_parser;
} while (parser->next != avpriv_atomic_ptr_cas((void * volatile *)&av_first_parser, parser->next, parser)); av_first_parser = parser;
ff_mutex_unlock(&parser_register_mutex);
} }
AVCodecParserContext *av_parser_init(int codec_id) AVCodecParserContext *av_parser_init(int codec_id)