MonetDB: default - Missing third implementation of MT_rwlock_rdt...

[Sjoerd Mullender]

Changeset: edbc2320d720 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/edbc2320d720
Modified Files:
        gdk/gdk_system.h
Branch: default
Log Message:

Missing third implementation of MT_rwlock_rdtry and MT_rwlock_wrtry.


diffs (37 lines):

diff --git a/gdk/gdk_system.h b/gdk/gdk_system.h
--- a/gdk/gdk_system.h
+++ b/gdk/gdk_system.h
@@ -561,6 +561,15 @@ typedef struct MT_RWLock {
                (void) ATOMIC_INC(&(l)->readers);       \
                MT_lock_unset(&(l)->lock);              \
         } while (0)
+static inline bool
+MT_rwlock_rdtry(MT_RWLock *l)
+{
+       if (!MT_lock_try(l))
+               return false;
+       (void) ATOMIC_INC(&(l)->readers);
+       MT_lock_unset(&(l)->lock);
+       return true;
+}
 
 #define MT_rwlock_rdunlock(l)  ((void) ATOMIC_DEC(&(l)->readers))
 
@@ -570,6 +579,17 @@ typedef struct MT_RWLock {
                while (ATOMIC_GET(&(l)->readers) > 0)   \
                        MT_sleep_ms(1);                 \
         } while (0)
+static inline bool
+MT_rwlock_wrtry(MT_RWLock *l)
+{
+       if (!MT_lock_try(l))
+               return false;
+       if (ATOMIC_GET(&l->readers) > 0) {
+               MT_lock_unset(l);
+               return false;
+       }
+       return true;
+}
 
 #define MT_rwlock_wrunlock(l)  MT_lock_unset(&(l)->lock)
 
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