diff options
Diffstat (limited to 'libusb/os/threads_posix.c')
| -rw-r--r-- | libusb/os/threads_posix.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/libusb/os/threads_posix.c b/libusb/os/threads_posix.c index 92bb11d..76384ac 100644 --- a/libusb/os/threads_posix.c +++ b/libusb/os/threads_posix.c @@ -52,22 +52,30 @@ int usbi_cond_timedwait(pthread_cond_t *cond, int usbi_get_tid(void) { - int ret; +#ifdef HAVE_CC_THREAD_LOCAL + static _Thread_local int tid; + + if (tid) + return tid; +#else + int tid; +#endif + #if defined(__ANDROID__) - ret = gettid(); + tid = gettid(); #elif defined(__linux__) - ret = syscall(SYS_gettid); + tid = syscall(SYS_gettid); #elif defined(__OpenBSD__) /* The following only works with OpenBSD > 5.1 as it requires real thread support. For 5.1 and earlier, -1 is returned. */ - ret = syscall(SYS_getthrid); + tid = syscall(SYS_getthrid); #elif defined(__APPLE__) - ret = (int)pthread_mach_thread_np(pthread_self()); + tid = (int)pthread_mach_thread_np(pthread_self()); #elif defined(__CYGWIN__) - ret = GetCurrentThreadId(); + tid = GetCurrentThreadId(); #else - ret = -1; + tid = -1; #endif /* TODO: NetBSD thread ID support */ - return ret; + return tid; } |