X-Git-Url: http://mj.ucw.cz/gitweb/?a=blobdiff_plain;f=lib%2Fthreads.c;h=d2e0f220d769bce15c34935cb12ca259e8413cfe;hb=434c630cf7aa4b4facc1d2fcfb6e9bc4cf21dff1;hp=f5e828f313adecb9e9ef02ec368e841fcb90ac65;hpb=887aca53efaf08a47dc4c4fba867d5816538e841;p=libucw.git

diff --git a/lib/threads.c b/lib/threads.c
index f5e828f3..d2e0f220 100644
--- a/lib/threads.c
+++ b/lib/threads.c
@@ -14,6 +14,15 @@
 
 #include <pthread.h>
 
+#ifdef CONFIG_LINUX
+#include <sys/types.h>
+#include <linux/unistd.h>
+#ifdef __NR_gettid
+static _syscall0(pid_t, gettid)
+#define CONFIG_USE_GETTID
+#endif
+#endif
+
 static pthread_key_t ucwlib_context_key;
 static pthread_mutex_t ucwlib_master_mutex;
 
@@ -35,9 +44,17 @@ static int
 ucwlib_tid(void)
 {
   static int tid_counter;
+  int tid;
+
+#ifdef CONFIG_USE_GETTID
+  tid = gettid();
+  if (tid > 0)
+    return tid;
+  /* The syscall might be unimplemented */
+#endif
 
   ucwlib_lock();
-  int tid = ++tid_counter;
+  tid = ++tid_counter;
   ucwlib_unlock();
   return tid;
 }