Add a pair of convenience macros for handling threads to minimize code duplication

This commit was SVN r22861.

opal/threads/threads.h

@@ -28,6 +28,8 @@
 #endif
 
 #include "opal/class/opal_object.h"
+#include "mutex.h"
+#include "condition.h"
 
 BEGIN_C_DECLS
 
@@ -58,6 +60,23 @@ typedef struct opal_thread_t opal_thread_t;
 
 OPAL_DECLSPEC OBJ_CLASS_DECLARATION(opal_thread_t);
 
+#define OPAL_ACQUIRE_THREAD(lck, cnd, act)      \
+    do {                                        \
+        OPAL_THREAD_LOCK((lck));                \
+        while (*(act)) {                        \
+            opal_condition_wait((cnd), (lck));  \
+        }                                       \
+        *(act) = true;                          \
+    } while(0);
+
+#define OPAL_RELEASE_THREAD(lck, cnd, act)      \
+    do {                                        \
+        *(act) = false;                         \
+        opal_condition_broadcast((cnd));        \
+        OPAL_THREAD_UNLOCK((lck));              \
+    } while(0);
+
+
 OPAL_DECLSPEC int  opal_thread_start(opal_thread_t *);
 OPAL_DECLSPEC int  opal_thread_join(opal_thread_t *, void **thread_return);
 OPAL_DECLSPEC bool opal_thread_self_compare(opal_thread_t*);