Changeset 68698 in vbox

Timestamp:

Sep 7, 2017 3:06:15 PM (7 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

117929

Message:

asm.h: Add ASMAtomicWriteZ

File:

• trunk/include/iprt/asm.h (modified) (1 diff)

trunk/include/iprt/asm.h

@@ -2374 +2374 @@
 
 /**
+ * Atomically writes a size_t value, ordered.
+ *
+ * @returns nothing.
+ * @param   pcb     Pointer to the size_t variable to write.
+ * @param   cb      The value to assign to *pcb.
+ */
+DECLINLINE(void) ASMAtomicWriteZ(volatile size_t RT_FAR *pcb, size_t cb)
+{
+#if ARCH_BITS == 64
+    ASMAtomicWriteU64((uint64_t volatile *)pcb, cb);
+#elif ARCH_BITS == 32
+    ASMAtomicWriteU32((uint32_t volatile *)pcb, cb);
+#elif ARCH_BITS == 16
+    AssertCompileSize(size_t, 2);
+    ASMAtomicWriteU16((uint16_t volatile *)pcb, cb);
+#else
+# error "Unsupported ARCH_BITS value"
+#endif
+}
+
+
+/**
  * Atomically writes a boolean value, unordered.
  *