Changeset 12c1eef for libcfa/src/bits/locks.hfa

Timestamp:

Jan 19, 2022, 2:36:56 PM (4 years ago)

Author:

Michael Brooks <mlbrooks@…>

Branches:

ADT, ast-experimental, enum, master, pthread-emulation, qualifiedEnum

Children:

97c215f

Parents:

5235d49 (diff), 6a33e40 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge branch 'master' of plg.uwaterloo.ca:software/cfa/cfa-cc

File:

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

libcfa/src/bits/locks.hfa

@@ -31 +31 @@
                 // previous thread to acquire the lock
                 void* prev_thrd;
+                // keep track of number of times we had to spin, just in case the number is unexpectedly huge
+                size_t spin_count;
         #endif
 };
@@ -48 +50 @@
         static inline void ?{}( __spinlock_t & this ) {
                 this.lock = 0;
+                #ifdef __CFA_DEBUG__
+                        this.spin_count = 0;
+                #endif
         }
 
@@ -72 +77 @@
                 for ( unsigned int i = 1;; i += 1 ) {
                         if ( (this.lock == 0) && (__atomic_test_and_set( &this.lock, __ATOMIC_ACQUIRE ) == 0) ) break;
+                        #ifdef __CFA_DEBUG__
+                                this.spin_count++;
+                        #endif
                         #ifndef NOEXPBACK
                                 // exponential spin