Changeset 8def349 for src/libcfa/concurrency/kernel

Timestamp:

Jan 24, 2017, 11:45:13 AM (8 years ago)

Author:

Thierry Delisle <tdelisle@…>

Branches:

ADT, aaron-thesis, arm-eh, ast-experimental, cleanup-dtors, deferred_resn, demangler, enum, forall-pointer-decay, jacob/cs343-translation, jenkins-sandbox, master, new-ast, new-ast-unique-expr, new-env, no_list, persistent-indexer, pthread-emulation, qualifiedEnum, resolv-new, with_gc

Children:

60819df7

Parents:

63f78f0

Message:

cfa now supports processors which represent kernel threads, allowing basic parallelism

File:

• src/libcfa/concurrency/kernel (modified) (3 diffs)

src/libcfa/concurrency/kernel ¶

@@ -22 +22 @@
 #include "invoke.h"
 
+extern "C" {
+#include <pthread.h>
+}
+
 //-----------------------------------------------------------------------------
 // Cluster
 struct cluster {
         simple_thread_list ready_queue;
+        pthread_spinlock_t lock;
 };
 
@@ -38 +43 @@
         coroutine * current_coroutine;
         thread_h * current_thread;
-        bool terminated;
+        pthread_t kernel_thread;
+        simple_lock lock;
+        volatile bool terminated;
 };
 
+void ?{}(processor * this);
 void ?{}(processor * this, cluster * cltr);
 void ^?{}(processor * this);
@@ -54 +62 @@
 void unlock( simple_lock * );
 
+struct pthread_spinlock_guard {
+        pthread_spinlock_t * lock;
+};
+
+static inline void ?{}( pthread_spinlock_guard * this, pthread_spinlock_t * lock ) {
+        this->lock = lock;
+        pthread_spin_lock( this->lock );
+}
+
+static inline void ^?{}( pthread_spinlock_guard * this ) {
+        pthread_spin_unlock( this->lock );
+}
+
+// //Simple spinlock implementation from 
+// //http://stackoverflow.com/questions/1383363/is-my-spin-lock-implementation-correct-and-optimal
+// //Not optimal but correct
+// #define VOL 
+
+// struct simple_spinlock {
+//      VOL int lock;
+// };
+
+// extern VOL int __sync_lock_test_and_set( VOL int *, VOL int);
+// extern void __sync_synchronize();
+
+// static inline void lock( simple_spinlock * this ) {
+//     while (__sync_lock_test_and_set(&this->lock, 1)) {
+//         // Do nothing. This GCC builtin instruction
+//         // ensures memory barrier.
+//     }
+// }
+
+// static inline void unlock( simple_spinlock * this ) {
+//     __sync_synchronize(); // Memory barrier.
+//     this->lock = 0;
+// }
+
 #endif //KERNEL_H