Changeset 2965d18 in mainline for uspace/lib/c/generic/fibril_synch.c

Timestamp:

2018-07-30T20:15:38Z (7 years ago)

Author:

Jiří Zárevúcky <jiri.zarevucky@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

d4b7b29

Parents:

8080262

git-author:

Jiří Zárevúcky <jiri.zarevucky@…> (2018-07-30 19:53:13)

git-committer:

Jiří Zárevúcky <jiri.zarevucky@…> (2018-07-30 20:15:38)

Message:

Add debug counter for rmutex locks.

File:

• uspace/lib/c/generic/fibril_synch.c (modified) (1 diff)

uspace/lib/c/generic/fibril_synch.c

@@ -50 +50 @@
 #include "private/async.h"
 #include "private/fibril.h"
+
+void fibril_rmutex_initialize(fibril_rmutex_t *m)
+{
+        futex_initialize(&m->futex, 1);
+}
+
+/**
+ * Lock restricted mutex.
+ * When a restricted mutex is locked, the fibril may not sleep or create new
+ * threads. Any attempt to do so will abort the program.
+ */
+void fibril_rmutex_lock(fibril_rmutex_t *m)
+{
+        futex_lock(&m->futex);
+        fibril_self()->rmutex_locks++;
+}
+
+bool fibril_rmutex_trylock(fibril_rmutex_t *m)
+{
+        if (futex_trylock(&m->futex)) {
+                fibril_self()->rmutex_locks++;
+                return true;
+        } else {
+                return false;
+        }
+}
+
+void fibril_rmutex_unlock(fibril_rmutex_t *m)
+{
+        fibril_self()->rmutex_locks--;
+        futex_unlock(&m->futex);
+}
 
 static fibril_local bool deadlocked = false;