Support to multi-threading and pthread interface (POSIX.1-2008) (#23)

[lunaix-os.git] / lunaix-os / kernel / ds / semaphore.c

diff --git a/lunaix-os/kernel/ds/semaphore.c b/lunaix-os/kernel/ds/semaphore.c
index 21d0e3399d761f3aaf2d3528a83dd55187144143..b02266c0574c8918824852790911188a597752e4 100644 (file)
--- a/lunaix-os/kernel/ds/semaphore.c
+++ b/lunaix-os/kernel/ds/semaphore.c
@@ -1,17 +1,25 @@
 #include <lunaix/ds/semaphore.h>
 #include <lunaix/ds/semaphore.h>

+#include <lunaix/sched.h>

 
 

-void sem_init(struct sem_t *sem, unsigned int initial) {
+void
+sem_init(struct sem_t* sem, unsigned int initial)
+{

     sem->counter = ATOMIC_VAR_INIT(initial);
 }
 
     sem->counter = ATOMIC_VAR_INIT(initial);
 }
 

-void sem_wait(struct sem_t *sem) {
+void
+sem_wait(struct sem_t* sem)
+{

     while (!atomic_load(&sem->counter)) {
     while (!atomic_load(&sem->counter)) {

-        // TODO: yield the cpu
+        // FIXME: better thing like wait queue
+        sched_pass();

     }
     atomic_fetch_sub(&sem->counter, 1);
 }
 
     }
     atomic_fetch_sub(&sem->counter, 1);
 }
 

-void sem_post(struct sem_t *sem) {
+void
+sem_post(struct sem_t* sem)
+{

     atomic_fetch_add(&sem->counter, 1);
     // TODO: wake up a thread
 }
\ No newline at end of file
     atomic_fetch_add(&sem->counter, 1);
     // TODO: wake up a thread
 }
\ No newline at end of file