xnu-6153.141.1.tar.gz

[apple/xnu.git] / iokit / Kernel / IOInterruptController.cpp

diff --git a/iokit/Kernel/IOInterruptController.cpp b/iokit/Kernel/IOInterruptController.cpp
index f84357e38d0bbcc2f5f93db8ce68d68d71be13c3..664890442079d120689ff871d3ef0ff025968d0d 100644 (file)
--- a/iokit/Kernel/IOInterruptController.cpp
+++ b/iokit/Kernel/IOInterruptController.cpp
@@ -104,10 +104,10 @@ IOInterruptController::registerInterrupt(IOService *nub, int source,
        // register as a shared interrupt.
        if (wasAlreadyRegisterd || shouldBeShared) {
                // If this vector is not already shared, break it out.
-               if (vector->sharedController == 0) {
+               if (vector->sharedController == NULL) {
                        // Make the IOShareInterruptController instance
                        vector->sharedController = new IOSharedInterruptController;
-                       if (vector->sharedController == 0) {
+                       if (vector->sharedController == NULL) {
                                IOLockUnlock(vector->interruptLock);
                                return kIOReturnNoMemory;
                        }
@@ -133,7 +133,7 @@ IOInterruptController::registerInterrupt(IOService *nub, int source,
                                        enableInterrupt(originalNub, originalSource);
                                }
                                vector->sharedController->release();
-                               vector->sharedController = 0;
+                               vector->sharedController = NULL;
                                IOLockUnlock(vector->interruptLock);
                                return error;
                        }
@@ -163,7 +163,7 @@ IOInterruptController::registerInterrupt(IOService *nub, int source,
                                        enableInterrupt(originalNub, originalSource);
 
                                        vector->sharedController->release();
-                                       vector->sharedController = 0;
+                                       vector->sharedController = NULL;
                                        IOLockUnlock(vector->interruptLock);
                                        return error;
                                }
@@ -174,7 +174,7 @@ IOInterruptController::registerInterrupt(IOService *nub, int source,
                        vector->nub     = vector->sharedController;
                        vector->source  = 0;
                        vector->target  = vector->sharedController;
-                       vector->refCon  = 0;
+                       vector->refCon  = NULL;
 
                        // If the interrupt was already registered,
                        // save the driver's interrupt enablement state.
@@ -259,11 +259,11 @@ IOInterruptController::unregisterInterrupt(IOService *nub, int source)
        vector->interruptDisabledSoft = 0;
        vector->interruptDisabledHard = 0;
        vector->interruptRegistered = 0;
-       vector->nub = 0;
+       vector->nub = NULL;
        vector->source = 0;
-       vector->handler = 0;
-       vector->target = 0;
-       vector->refCon = 0;
+       vector->handler = NULL;
+       vector->target = NULL;
+       vector->refCon = NULL;
 
        IOLockUnlock(vector->interruptLock);
        return kIOReturnSuccess;
@@ -278,7 +278,7 @@ IOInterruptController::getInterruptType(IOService *nub, int source,
        IOInterruptVector *vector;
        OSData            *vectorData;
 
-       if (interruptType == 0) {
+       if (interruptType == NULL) {
                return kIOReturnBadArgument;
        }
 
@@ -317,7 +317,9 @@ IOInterruptController::enableInterrupt(IOService *nub, int source)
                }
                if (vector->interruptDisabledHard) {
                        vector->interruptDisabledHard = 0;
-
+#if !defined(__i386__) && !defined(__x86_64__)
+                       OSMemoryBarrier();
+#endif
                        enableVector(vectorNumber, vector);
                }
        }
@@ -372,7 +374,7 @@ IOInterruptController::causeInterrupt(IOService *nub, int source)
 IOInterruptAction
 IOInterruptController::getInterruptHandlerAddress(void)
 {
-       return 0;
+       return NULL;
 }
 
 IOReturn
@@ -507,7 +509,7 @@ IOSharedInterruptController::initInterruptController(IOInterruptController *pare
 
        // Allocate the IOInterruptSource so this can act like a nub.
        _interruptSources = (IOInterruptSource *)IOMalloc(sizeof(IOInterruptSource));
-       if (_interruptSources == 0) {
+       if (_interruptSources == NULL) {
                return kIOReturnNoMemory;
        }
        _numInterruptSources = 1;
@@ -537,7 +539,7 @@ IOSharedInterruptController::initInterruptController(IOInterruptController *pare
 
        // Allocate the lock for the controller.
        controllerLock = IOSimpleLockAlloc();
-       if (controllerLock == 0) {
+       if (controllerLock == NULL) {
                return kIOReturnNoResources;
        }
 
@@ -571,7 +573,7 @@ IOSharedInterruptController::registerInterrupt(IOService *nub,
 {
        IOInterruptSource *interruptSources;
        IOInterruptVectorNumber vectorNumber;
-       IOInterruptVector *vector = 0;
+       IOInterruptVector *vector = NULL;
        OSData            *vectorData;
        IOInterruptState  interruptState;
 
@@ -607,7 +609,7 @@ IOSharedInterruptController::registerInterrupt(IOService *nub,
 
        // Create the vectorData for the IOInterruptSource.
        vectorData = OSData::withBytes(&vectorNumber, sizeof(vectorNumber));
-       if (vectorData == 0) {
+       if (vectorData == NULL) {
                IOLockUnlock(vector->interruptLock);
                return kIOReturnNoMemory;
        }
@@ -667,11 +669,11 @@ IOSharedInterruptController::unregisterInterrupt(IOService *nub,
                vector->interruptDisabledSoft = 0;
                vector->interruptDisabledHard = 0;
                vector->interruptRegistered = 0;
-               vector->nub = 0;
+               vector->nub = NULL;
                vector->source = 0;
-               vector->handler = 0;
-               vector->target = 0;
-               vector->refCon = 0;
+               vector->handler = NULL;
+               vector->target = NULL;
+               vector->refCon = NULL;
 
                interruptState = IOSimpleLockLockDisableInterrupt(controllerLock);
                vectorsRegistered--;