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authorRich Felker <dalias@aerifal.cx>2011-03-03 18:30:44 -0500
committerRich Felker <dalias@aerifal.cx>2011-03-03 18:30:44 -0500
commitb480808a6a511c9350a6559b63938ac261c83a76 (patch)
treee5479cfec9500cc5cd2db4466d7bab2847d64735 /src/thread/pthread_self.c
parenta53d2f3425aa32b5770b03acbab12d1df3af7226 (diff)
downloadmusl-b480808a6a511c9350a6559b63938ac261c83a76.tar.gz
optimize POSIX TSD for fast pthread_getspecific
Diffstat (limited to 'src/thread/pthread_self.c')
-rw-r--r--src/thread/pthread_self.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/src/thread/pthread_self.c b/src/thread/pthread_self.c
index 3a4d4c58..028d387b 100644
--- a/src/thread/pthread_self.c
+++ b/src/thread/pthread_self.c
@@ -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;