diff options
Diffstat (limited to 'src/thread/pthread_self.c')
-rw-r--r-- | src/thread/pthread_self.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/thread/pthread_self.c b/src/thread/pthread_self.c new file mode 100644 index 00000000..686d73d5 --- /dev/null +++ b/src/thread/pthread_self.c @@ -0,0 +1,39 @@ +#include "pthread_impl.h" + +static struct pthread main_thread; + +#undef errno +static int *errno_location() +{ + return pthread_self()->errno_ptr; +} + +static int init_main_thread() +{ + main_thread.tlsdesc[0] = -1; + main_thread.tlsdesc[1] = (long)&main_thread; + main_thread.tlsdesc[2] = SIZE_MAX/PAGE_SIZE; + main_thread.tlsdesc[3] = 0x51; + main_thread.self = &main_thread; + main_thread.errno_ptr = __errno_location(); + if (__set_thread_area(main_thread.tlsdesc) < 0) + return -1; + syscall1(__NR_set_tid_address, (long)&main_thread.tid); + libc.errno_location = errno_location; + main_thread.tid = main_thread.pid = getpid(); + return 0; +} + +#undef pthread_self + +pthread_t pthread_self() +{ + static int init, failed; + if (!init) { + if (failed) return 0; + if (init_main_thread() < 0) failed = 1; + if (failed) return 0; + init = 1; + } + return __pthread_self(); +} |