1 files changed, 80 insertions, 0 deletions
diff --git a/src/pulsecore/atomic.h b/src/pulsecore/atomic.h
new file mode 100644
index 00000000..f789142d
--- /dev/null
+++ b/src/pulsecore/atomic.h
@@ -0,0 +1,80 @@
+#ifndef foopulseatomichfoo
+#define foopulseatomichfoo
+
+/* $Id$ */
+
+/***
+  This file is part of PulseAudio.
+ 
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as
+  published by the Free Software Foundation; either version 2 of the
+  License, or (at your option) any later version.
+ 
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+ 
+  You should have received a copy of the GNU Lesser General Public
+  License along with PulseAudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#include <atomic_ops.h>
+
+/* atomic_ops guarantees us that sizeof(AO_t) == sizeof(void*).
+ *
+ * It is not guaranteed however, that sizeof(AO_t) == sizeof(size_t).
+ * however very likely. */
+
+typedef struct pa_atomic_int {
+    volatile AO_t value;
+} pa_atomic_int_t;
+
+/* For now we do only full memory barriers. Eventually we might want
+ * to support more elaborate memory barriers, in which case we will add
+ * suffixes to the function names */
+
+static inline int pa_atomic_load(const pa_atomic_int_t *a) {
+    return (int) AO_load_full((AO_t*) &a->value);
+}
+
+static inline void pa_atomic_store(pa_atomic_int_t *a, int i) {
+    AO_store_full(&a->value, (AO_t) i);
+}
+
+static inline int pa_atomic_add(pa_atomic_int_t *a, int i) {
+    return AO_fetch_and_add_full(&a->value, (AO_t) i);
+}
+
+static inline int pa_atomic_inc(pa_atomic_int_t *a) {
+    return AO_fetch_and_add1_full(&a->value);
+}
+
+static inline int pa_atomic_dec(pa_atomic_int_t *a) {
+    return AO_fetch_and_sub1_full(&a->value);
+}
+
+static inline int pa_atomic_cmpxchg(pa_atomic_int_t *a, int old_i, int new_i) {
+    return AO_compare_and_swap_full(&a->value, old_i, new_i);
+}
+
+typedef struct pa_atomic_ptr {
+    volatile AO_t value;
+} pa_atomic_ptr_t;
+
+static inline void* pa_atomic_ptr_load(const pa_atomic_ptr_t *a) {
+    return (void*) AO_load_full((AO_t*) &a->value);
+}
+
+static inline void pa_atomic_ptr_store(pa_atomic_ptr_t *a, void *p) {
+    AO_store_full(&a->value, (AO_t) p);
+}
+
+static inline int pa_atomic_ptr_cmpxchg(pa_atomic_ptr_t *a, void *old_p, void* new_p) {
+    return AO_compare_and_swap_full(&a->value, (AO_t) old_p, (AO_t) new_p);
+}
+
+#endif