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optimize POSIX TSD for fast pthread_getspecific

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This commit is contained in:
Rich Felker
2011-03-03 18:30:44 -05:00
parent a53d2f3425
commit b480808a6a
4 changed files with 14 additions and 9 deletions
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11
src/thread/pthread_self.c
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@ -2,6 +2,10 @@
static struct pthread main_thread;
/* pthread_key_create.c overrides this */
static const size_t dummy = 0;
weak_alias(dummy, __pthread_tsd_size);
#undef errno
static int *errno_location()
{
@ -10,6 +14,13 @@ static int *errno_location()
static int init_main_thread()
{
void *tsd = 0;
if (__pthread_tsd_size) {
tsd = mmap(0, __pthread_tsd_size, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
if (tsd == MAP_FAILED) return -1;
}
main_thread.tsd = tsd;
main_thread.self = &main_thread;
if (__set_thread_area(&main_thread) < 0)
return -1;