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//
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// MYCoroutine.m
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// Coroutines
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//
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// Created by Jens Alfke on 4/29/08.
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// Copyright 2008 Jens Alfke. All rights reserved.
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// License is at the bottom of this file.
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//
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#import "MYCoroutine.h"
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#import "CoroX.h"
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#ifndef LogTo
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#define kEnableLog 0 /* 1 enables logging, 0 disables it */
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#define LogTo(DOMAIN,MSG,...) do{ if(kEnableLog) NSLog(@""#DOMAIN ": " MSG,__VA_ARGS__); }while(0)
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#endif
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#ifndef Warn
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#define Warn(MSG,...) NSLog(@"WARNING: " #MSG,__VA_ARGS__)
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#endif
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@implementation MYCoroutine
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static MYCoroutine *sMain, *sCurrent;
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+ (void) initialize
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{
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if( self == [MYCoroutine class] ) {
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sMain = [[self alloc] init];
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Coro_initializeMainCoro(sMain->_coro);
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sMain.name = @"MAIN";
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sCurrent = sMain;
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}
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}
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- (id) init
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{
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self = [super init];
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if (self != nil) {
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_coro = Coro_new();
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LogTo(Coroutine,@"INIT %@ : _coro=%p",self,_coro);
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}
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return self;
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}
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- (void) dealloc
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{
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LogTo(Coroutine,@"DEALLOC %@",self);
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Coro_free(_coro);
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[super dealloc];
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}
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- (NSString*) description
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{
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if( _name )
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return [NSString stringWithFormat: @"%@[%@]", [self class],_name];
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else
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return [NSString stringWithFormat: @"%@[%p]", [self class],self];
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}
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@synthesize name=_name;
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+ (MYCoroutine*) mainCoroutine {return sMain;}
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+ (MYCoroutine*) currentCoroutine {return sCurrent;}
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- (BOOL) isCurrent {return self==sCurrent;}
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- (const void*) stack {return Coro_stack(_coro);}
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- (size_t) stackSize {return Coro_stackSize(_coro);}
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- (void) setStackSize: (size_t)size {Coro_setStackSize_(_coro,size);}
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- (size_t) bytesLeftOnStack {return Coro_bytesLeftOnStack(_coro);}
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- (BOOL) stackSpaceAlmostGone {return Coro_stackSpaceAlmostGone(_coro);}
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static void startWithInvocation( void *context )
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{
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[(NSInvocation*)context invoke];
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}
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static void startWithMain( void *context )
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{
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[(MYCoroutine*)context main];
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}
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- (void) startWithInvocation: (NSInvocation*)invocation
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{
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LogTo(Coroutine,@"Starting %@ (currently in %@)",self,sCurrent);
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MYCoroutine *current = sCurrent;
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sCurrent = self;
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if( invocation )
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Coro_startCoro_(current->_coro, _coro, invocation, &startWithInvocation);
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else
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Coro_startCoro_(current->_coro, _coro, self, &startWithMain);
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sCurrent = current;
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LogTo(Coroutine,@"...resumed %@ after starting %@",sCurrent,self);
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}
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- (void) start
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{
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[self startWithInvocation: nil];
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}
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+ (MYCoroutine*) startWithInvocation: (NSInvocation*)invocation
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{
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MYCoroutine *cr = [[self alloc] init];
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[cr startWithInvocation: invocation];
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return cr;
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}
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- (void) resume
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{
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LogTo(Coroutine,@"Resuming %@ (currently in %@)",self,sCurrent);
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MYCoroutine *current = sCurrent;
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sCurrent = self;
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Coro_switchTo_(current->_coro,_coro);
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sCurrent = current;
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LogTo(Coroutine,@"...resumed %@",sCurrent);
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}
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- (void) main
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{
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// subclasses should override this.
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}
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@end
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/*
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(This is a BSD License)
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Copyright (c) 2008 Jens Alfke
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification, are
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permitted provided that the following conditions are met:
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• Redistributions of source code must retain the above copyright notice, this list of
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conditions and the following disclaimer.
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• Redistributions in binary form must reproduce the above copyright notice, this list
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of conditions and the following disclaimer in the documentation and/or other materials
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provided with the distribution.
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• Neither the name of the author nor the names of other contributors may be used to
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endorse or promote products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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