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Use gmtime_r instead of gmtime and localtime_r instead of localtime

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gmtime isn't thread safe in general. In msvcrt (which lacks gmtime_r),
the buffer used by gmtime is thread specific though.

One call to localtime is left in avconv_opt.c, where thread safety
shouldn't matter (instead of making avconv depend on the libavutil
internal header).

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2014-10-24 10:46:36 +03:00
parent 3f8f1c6ff2
commit 82ee7d0dda
4 changed files with 17 additions and 9 deletions
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5
libavformat/mov.c
View File

@ -34,6 +34,7 @@
#include "libavutil/intreadwrite.h"
#include "libavutil/intfloat.h"
#include "libavutil/mathematics.h"
#include "libavutil/time_internal.h"
#include "libavutil/avstring.h"
#include "libavutil/dict.h"
#include "libavcodec/ac3tab.h"
@ -739,9 +740,9 @@ static void mov_metadata_creation_time(AVDictionary **metadata, time_t time)
{
char buffer[32];
if (time) {
struct tm *ptm;
struct tm *ptm, tmbuf;
time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
ptm = gmtime(&time);
ptm = gmtime_r(&time, &tmbuf);
if (!ptm) return;
if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
av_dict_set(metadata, "creation_time", buffer, 0);

4
libavformat/mxfenc.c
View File

@ -35,6 +35,7 @@
#include <time.h>
#include "libavutil/random_seed.h"
#include "libavutil/time_internal.h"
#include "libavcodec/bytestream.h"
#include "audiointerleave.h"
#include "avformat.h"
@ -1386,7 +1387,8 @@ static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st,
static uint64_t mxf_parse_timestamp(time_t timestamp)
{
struct tm *time = gmtime(&timestamp);
struct tm tmbuf;
struct tm *time = gmtime_r(&timestamp, &tmbuf);
if (!time)
return 0;
return (uint64_t)(time->tm_year+1900) << 48 |

10
libavformat/wtv.c
View File

@ -31,6 +31,7 @@
#include "libavutil/intreadwrite.h"
#include "libavutil/intfloat.h"
#include "libavutil/dict.h"
#include "libavutil/time_internal.h"
#include "avformat.h"
#include "internal.h"
#include "riff.h"
@ -428,7 +429,8 @@ static int read_probe(AVProbeData *p)
static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
{
time_t t = (value / 10000000LL) - 11644473600LL;
struct tm *tm = gmtime(&t);
struct tm tmbuf;
struct tm *tm = gmtime_r(&t, &tmbuf);
if (tm) {
if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
buf[0] = '\0';
@ -442,7 +444,8 @@ static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
{
time_t t = (value / 10000000LL) - 719162LL*86400LL;
struct tm *tm = gmtime(&t);
struct tm tmbuf;
struct tm *tm = gmtime_r(&t, &tmbuf);
if (tm) {
if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
buf[0] = '\0';
@ -456,7 +459,8 @@ static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
static void oledate_to_iso8601(char *buf, int buf_size, int64_t value)
{
time_t t = 631112400LL + 86400*av_int2double(value);
struct tm *tm = gmtime(&t);
struct tm tmbuf;
struct tm *tm = gmtime_r(&t, &tmbuf);
if (tm) {
if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
buf[0] = '\0';

7
libavutil/parseutils.c
View File

@ -29,6 +29,7 @@
#include "eval.h"
#include "log.h"
#include "random_seed.h"
#include "time_internal.h"
#include "parseutils.h"
typedef struct {
@ -483,7 +484,7 @@ int av_parse_time(int64_t *timeval, const char *timestr, int duration)
{
const char *p;
int64_t t;
struct tm dt = { 0 };
struct tm dt = { 0 }, tmbuf;
int i;
static const char * const date_fmt[] = {
"%Y-%m-%d",
@ -527,9 +528,9 @@ int av_parse_time(int64_t *timeval, const char *timestr, int duration)
* current year-month-day time */
if (!q) {
if (is_utc) {
dt = *gmtime(&now);
dt = *gmtime_r(&now, &tmbuf);
} else {
dt = *localtime(&now);
dt = *localtime_r(&now, &tmbuf);
}
dt.tm_hour = dt.tm_min = dt.tm_sec = 0;
} else {