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ffmpeg: make transcode_init_done atomic.

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Should fix tsan warnings in fate-fifo-muxer-h264/wav:

WARNING: ThreadSanitizer: data race (pid=26552)
  Write of size 4 at 0x000001e0d7c0 by main thread:
    #0 transcode_init src/ffmpeg.c:3761 (ffmpeg+0x00000050ca1c)
[..]
  Previous read of size 4 at 0x000001e0d7c0 by thread T1:
    #0 decode_interrupt_cb src/ffmpeg.c:460 (ffmpeg+0x0000004fde19)
This commit is contained in:
Ronald S. Bultje 2017-03-31 11:27:20 -04:00
parent 467a053810
commit 76d8c77430
1 changed files with 5 additions and 4 deletions
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9
ffmpeg.c
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@ -30,6 +30,7 @@
#include <stdlib.h>
#include <errno.h>
#include <limits.h>
#include <stdatomic.h>
#include <stdint.h>
#if HAVE_IO_H
@ -319,7 +320,7 @@ void term_exit(void)
static volatile int received_sigterm = 0;
static volatile int received_nb_signals = 0;
static volatile int transcode_init_done = 0;
static atomic_int transcode_init_done = ATOMIC_VAR_INIT(0);
static volatile int ffmpeg_exited = 0;
static int main_return_code = 0;
@ -457,7 +458,7 @@ static int read_key(void)
static int decode_interrupt_cb(void *ctx)
{
return received_nb_signals > transcode_init_done;
return received_nb_signals > atomic_load(&transcode_init_done);
}
const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
@ -612,7 +613,7 @@ static void ffmpeg_cleanup(int ret)
if (received_sigterm) {
av_log(NULL, AV_LOG_INFO, "Exiting normally, received signal %d.\n",
(int) received_sigterm);
} else if (ret && transcode_init_done) {
} else if (ret && atomic_load(&transcode_init_done)) {
av_log(NULL, AV_LOG_INFO, "Conversion failed!\n");
}
term_exit();
@ -3758,7 +3759,7 @@ static int transcode_init(void)
return ret;
}
transcode_init_done = 1;
atomic_store(&transcode_init_done, 1);
return 0;
}