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/*
* libjingle
* Copyright 2012, Google Inc
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#import "talk/base/maccocoasocketserver.h"
#import <Foundation/Foundation.h>
#import <AppKit/AppKit.h>
#include <assert.h>
#include "talk/base/scoped_autorelease_pool.h"
// MacCocoaSocketServerHelper serves as a delegate to NSMachPort or a target for
// a timeout.
@interface MacCocoaSocketServerHelper : NSObject {
// This is a weak reference. This works fine since the
// talk_base::MacCocoaSocketServer owns this object.
talk_base::MacCocoaSocketServer* socketServer_; // Weak.
}
@end
@implementation MacCocoaSocketServerHelper
- (id)initWithSocketServer:(talk_base::MacCocoaSocketServer*)ss {
self = [super init];
if (self) {
socketServer_ = ss;
}
return self;
}
- (void)timerFired:(NSTimer*)timer {
socketServer_->WakeUp();
}
- (void)breakMainloop {
[NSApp stop:self];
// NSApp stop only exits after finishing processing of the
// current event. Since we're potentially in a timer callback
// and not an NSEvent handler, we need to trigger a dummy one
// and turn the loop over. We may be able to skip this if we're
// on the ss' thread and not inside the app loop already.
NSEvent* event = [NSEvent otherEventWithType:NSApplicationDefined
location:NSMakePoint(0,0)
modifierFlags:0
timestamp:0
windowNumber:0
context:nil
subtype:0
data1:0
data2:0];
[NSApp postEvent:event atStart:NO];
}
@end
namespace talk_base {
MacCocoaSocketServer::MacCocoaSocketServer() {
helper_ = [[MacCocoaSocketServerHelper alloc] initWithSocketServer:this];
timer_ = nil;
run_count_ = 0;
// Initialize the shared NSApplication
[NSApplication sharedApplication];
}
MacCocoaSocketServer::~MacCocoaSocketServer() {
[timer_ invalidate];
[timer_ release];
[helper_ release];
}
// ::Wait is reentrant, for example when blocking on another thread while
// responding to I/O. Calls to [NSApp] MUST be made from the main thread
// only!
bool MacCocoaSocketServer::Wait(int cms, bool process_io) {
talk_base::ScopedAutoreleasePool pool;
if (!process_io && cms == 0) {
// No op.
return true;
}
if ([NSApp isRunning]) {
// Only allow reentrant waiting if we're in a blocking send.
ASSERT(!process_io && cms == kForever);
}
if (!process_io) {
// No way to listen to common modes and not get socket events, unless
// we disable each one's callbacks.
EnableSocketCallbacks(false);
}
if (kForever != cms) {
// Install a timer that fires wakeup after cms has elapsed.
timer_ =
[NSTimer scheduledTimerWithTimeInterval:cms / 1000.0
target:helper_
selector:@selector(timerFired:)
userInfo:nil
repeats:NO];
[timer_ retain];
}
// Run until WakeUp is called, which will call stop and exit this loop.
run_count_++;
[NSApp run];
run_count_--;
if (!process_io) {
// Reenable them. Hopefully this won't cause spurious callbacks or
// missing ones while they were disabled.
EnableSocketCallbacks(true);
}
return true;
}
// Can be called from any thread. Post a message back to the main thread to
// break out of the NSApp loop.
void MacCocoaSocketServer::WakeUp() {
if (timer_ != nil) {
[timer_ invalidate];
[timer_ release];
timer_ = nil;
}
// [NSApp isRunning] returns unexpected results when called from another
// thread. Maintain our own count of how many times to break the main loop.
if (run_count_ > 0) {
[helper_ performSelectorOnMainThread:@selector(breakMainloop)
withObject:nil
waitUntilDone:false];
}
}
} // namespace talk_base
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