xnu-4903.221.2.tar.gz

[apple/xnu.git] / iokit / IOKit / IOWorkLoop.h

diff --git a/iokit/IOKit/IOWorkLoop.h b/iokit/IOKit/IOWorkLoop.h
index 73c868876b3c81bedadfb2420aa964d3a3e0476d..c62c13216ce4616c32199a3a3b0d356be031396d 100644 (file)
--- a/iokit/IOKit/IOWorkLoop.h
+++ b/iokit/IOKit/IOWorkLoop.h
@@ -74,6 +74,11 @@ member function's parameter list.
     typedef IOReturn (*Action)(OSObject *target,
                               void *arg0, void *arg1,
                               void *arg2, void *arg3);
+
+#ifdef __BLOCKS__
+    typedef IOReturn (^ActionBlock)();
+#endif /* __BLOCKS__ */
+
     enum {
        kPreciousStack  = 0x00000001,
        kTimeLockPanics = 0x00000002,
@@ -143,9 +148,6 @@ protected:
     struct ExpansionData {
        IOOptionBits options;
        IOEventSource *passiveEventChain;
-#if DEBUG
-       void * allocationBacktrace[16];
-#endif /* DEBUG */
 #if IOKITSTATS
        struct IOWorkLoopCounter *counter;
 #else
@@ -295,6 +297,16 @@ public:
                               void *arg0 = 0, void *arg1 = 0,
                               void *arg2 = 0, void *arg3 = 0);
 
+#ifdef __BLOCKS__
+/*! @function runAction
+    @abstract Single thread a call to an action with the work-loop.
+    @discussion Client function that causes the given action to be called in a single threaded manner.  Beware: the work-loop's gate is recursive and runAction can cause direct or indirect re-entrancy.  When executing on a client's thread, runAction will sleep until the work-loop's gate opens for execution of client actions, the action is single threaded against all other work-loop event sources.
+    @param action Block to be executed in work-loop context.
+    @result Returns the result of the action block.
+*/
+    IOReturn runActionBlock(ActionBlock action);
+#endif /* __BLOCKS__ */
+
 /*! @function runEventSources
     @discussion Consists of the inner 2 loops of the threadMain function(qv).
     The outer loop terminates when there is no more work, and the inside loop