Changes in src/libcfa/bits/locks.h [85b1deb:ea8b2f7]

File:

• src/libcfa/bits/locks.h (modified) (3 diffs)

src/libcfa/bits/locks.h

@@ -126 +126 @@
 
         struct __bin_sem_t {
-                bool                    signaled;
-                pthread_mutex_t         lock;
-                pthread_cond_t          cond;
+                int_fast8_t     counter;
+                pthread_mutex_t lock;
+                pthread_cond_t  cond;
         };
 
         static inline void ?{}(__bin_sem_t & this) with( this ) {
-                signaled = false;
+                counter = 0;
                 pthread_mutex_init(&lock, NULL);
                 pthread_cond_init (&cond, NULL);
@@ -145 +145 @@
                 verify(__cfaabi_dbg_in_kernel());
                 pthread_mutex_lock(&lock);
-                        if(!signaled) {   // this must be a loop, not if!
-                                pthread_cond_wait(&cond, &lock);
-                        }
-                        signaled = false;
+                if(counter != 0) {   // this must be a loop, not if!
+                        pthread_cond_wait(&cond, &lock);
+                }
+                counter = 1;
                 pthread_mutex_unlock(&lock);
         }
@@ -154 +154 @@
         static inline void post(__bin_sem_t & this) with( this ) {
                 verify(__cfaabi_dbg_in_kernel());
-
                 pthread_mutex_lock(&lock);
-                        bool needs_signal = !signaled;
-                        signaled = true;
+                bool needs_signal = counter == 0;
+                counter = 1;
                 pthread_mutex_unlock(&lock);
-
-                if (needs_signal)
+                if (!needs_signal)
                         pthread_cond_signal(&cond);
-        }
+                }
 #endif