10 files changed, 84 insertions, 7 deletions
diff --git a/src/internal/pthread_impl.h b/src/internal/pthread_impl.h
index 74c62cce..ae6e60b5 100644
--- a/src/internal/pthread_impl.h
+++ b/src/internal/pthread_impl.h
@@ -128,4 +128,6 @@ void __restore_sigs(void *);
 #define DEFAULT_STACK_SIZE 81920
 #define DEFAULT_GUARD_SIZE PAGE_SIZE
 
+#define __ATTRP_C11_THREAD ((void*)(uintptr_t)-1)
+
 #endif
diff --git a/src/thread/pthread_create.c b/src/thread/pthread_create.c
index c170a999..1a47ed15 100644
--- a/src/thread/pthread_create.c
+++ b/src/thread/pthread_create.c
@@ -119,7 +119,15 @@ static int start(void *p)
 	if (self->unblock_cancel)
 		__syscall(SYS_rt_sigprocmask, SIG_UNBLOCK,
 			SIGPT_SET, 0, _NSIG/8);
-	pthread_exit(self->start(self->start_arg));
+	__pthread_exit(self->start(self->start_arg));
+	return 0;
+}
+
+static int start_c11(void *p)
+{
+	pthread_t self = p;
+	int (*start)(void*) = (int(*)(void*)) self->start;
+	__pthread_exit((void *)(uintptr_t)start(self->start_arg));
 	return 0;
 }
 
@@ -145,7 +153,7 @@ void *__copy_tls(unsigned char *);
 
 int __pthread_create(pthread_t *restrict res, const pthread_attr_t *restrict attrp, void *(*entry)(void *), void *restrict arg)
 {
-	int ret;
+	int ret, c11 = (attrp == __ATTRP_C11_THREAD);
 	size_t size, guard;
 	struct pthread *self, *new;
 	unsigned char *map = 0, *stack = 0, *tsd = 0, *stack_limit;
@@ -167,7 +175,7 @@ int __pthread_create(pthread_t *restrict res, const pthread_attr_t *restrict att
 		self->tsd = (void **)__pthread_tsd_main;
 		libc.threaded = 1;
 	}
-	if (attrp) attr = *attrp;
+	if (attrp && !c11) attr = *attrp;
 
 	__acquire_ptc();
 
@@ -234,7 +242,7 @@ int __pthread_create(pthread_t *restrict res, const pthread_attr_t *restrict att
 	new->canary = self->canary;
 
 	a_inc(&libc.threads_minus_1);
-	ret = __clone(start, stack, flags, new, &new->tid, TP_ADJ(new), &new->tid);
+	ret = __clone((c11 ? start_c11 : start), stack, flags, new, &new->tid, TP_ADJ(new), &new->tid);
 
 	__release_ptc();
 
diff --git a/src/thread/pthread_detach.c b/src/thread/pthread_detach.c
index 4e454634..ed77f74d 100644
--- a/src/thread/pthread_detach.c
+++ b/src/thread/pthread_detach.c
@@ -1,8 +1,9 @@
 #include "pthread_impl.h"
+#include <threads.h>
 
 int __pthread_join(pthread_t, void **);
 
-int __pthread_detach(pthread_t t)
+static int __pthread_detach(pthread_t t)
 {
 	/* Cannot detach a thread that's already exiting */
 	if (a_swap(t->exitlock, 1))
@@ -13,3 +14,4 @@ int __pthread_detach(pthread_t t)
 }
 
 weak_alias(__pthread_detach, pthread_detach);
+weak_alias(__pthread_detach, thrd_detach);
diff --git a/src/thread/pthread_equal.c b/src/thread/pthread_equal.c
index 3e3df4fd..7c31482a 100644
--- a/src/thread/pthread_equal.c
+++ b/src/thread/pthread_equal.c
@@ -1,6 +1,11 @@
 #include <pthread.h>
+#include <threads.h>
+#include "libc.h"
 
-int (pthread_equal)(pthread_t a, pthread_t b)
+static int __pthread_equal(pthread_t a, pthread_t b)
 {
 	return a==b;
 }
+
+weak_alias(__pthread_equal, pthread_equal);
+weak_alias(__pthread_equal, thrd_equal);
diff --git a/src/thread/pthread_self.c b/src/thread/pthread_self.c
index 5f9e6516..241a6202 100644
--- a/src/thread/pthread_self.c
+++ b/src/thread/pthread_self.c
@@ -1,6 +1,11 @@
 #include "pthread_impl.h"
+#include <threads.h>
+#include "libc.h"
 
-pthread_t pthread_self()
+static pthread_t __pthread_self_internal()
 {
 	return __pthread_self();
 }
+
+weak_alias(__pthread_self_internal, pthread_self);
+weak_alias(__pthread_self_internal, thrd_current);
diff --git a/src/thread/thrd_create.c b/src/thread/thrd_create.c
new file mode 100644
index 00000000..e0336695
--- /dev/null
+++ b/src/thread/thrd_create.c
@@ -0,0 +1,14 @@
+#include "pthread_impl.h"
+#include <threads.h>
+
+int __pthread_create(pthread_t *restrict, const pthread_attr_t *restrict, void *(*)(void *), void *restrict);
+
+int thrd_create(thrd_t *thr, thrd_start_t func, void *arg)
+{
+	int ret = __pthread_create(thr, __ATTRP_C11_THREAD, (void *(*)(void *))func, arg);
+	switch (ret) {
+	case 0:      return thrd_success;
+	case EAGAIN: return thrd_nomem;
+	default:     return thrd_error;
+	}
+}
diff --git a/src/thread/thrd_exit.c b/src/thread/thrd_exit.c
new file mode 100644
index 00000000..b66bd996
--- /dev/null
+++ b/src/thread/thrd_exit.c
@@ -0,0 +1,9 @@
+#include "pthread_impl.h"
+#include <threads.h>
+
+_Noreturn void __pthread_exit(void *);
+
+_Noreturn void thrd_exit(int result)
+{
+	__pthread_exit((void*)(intptr_t)result);
+}
diff --git a/src/thread/thrd_join.c b/src/thread/thrd_join.c
new file mode 100644
index 00000000..ac667893
--- /dev/null
+++ b/src/thread/thrd_join.c
@@ -0,0 +1,12 @@
+#include <stdint.h>
+#include <threads.h>
+
+int __pthread_join(thrd_t, void**);
+
+int thrd_join(thrd_t t, int *res)
+{
+        void *pthread_res;
+        __pthread_join(t, &pthread_res);
+        if (res) *res = (int)(intptr_t)pthread_res;
+        return thrd_success;
+}
diff --git a/src/thread/thrd_sleep.c b/src/thread/thrd_sleep.c
new file mode 100644
index 00000000..e8dfe400
--- /dev/null
+++ b/src/thread/thrd_sleep.c
@@ -0,0 +1,13 @@
+#include <threads.h>
+#include <errno.h>
+#include "syscall.h"
+
+int thrd_sleep(const struct timespec *req, struct timespec *rem)
+{
+	int ret = __syscall(SYS_nanosleep, req, rem);
+	switch (ret) {
+	case 0:      return 0;
+	case -EINTR: return -1; /* value specified by C11 */
+	default:     return -2;
+	}
+}
diff --git a/src/thread/thrd_yield.c b/src/thread/thrd_yield.c
new file mode 100644
index 00000000..f7ad1321
--- /dev/null
+++ b/src/thread/thrd_yield.c
@@ -0,0 +1,7 @@
+#include <threads.h>
+#include "syscall.h"
+
+void thrd_yield()
+{
+	__syscall(SYS_sched_yield);
+}