122 lines
4.2 KiB
C
122 lines
4.2 KiB
C
/*
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* Copyright (c) 2012, 2013, Joel Bodenmann aka Tectu <joel@unormal.org>
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* Copyright (c) 2012, 2013, Andrew Hannam aka inmarket
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the <organization> nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (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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/*
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* This demo shows how to create a static thread and how to terminate it
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* after some period of time.
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* A GTimer is used to termiate the thread.
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*
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* Note: The GOS API does not provide any function to terminate or kill a thread
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* as not every operating system allows it to terminate a thread out
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* from another one. Therefore, we use the parameters to implement a
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* "fall over the edge" algorithm.
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*/
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#include "gfx.h"
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GTimer gt;
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gThread thd;
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#if defined(WIN32)
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#include <windows.h>
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static DWORD nres;
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// On Win32 don't use the C library fprintf or write as they crash.
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// Maybe we just need to add the multi-thread C library options to the compile.
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// Instead we use the Win32 API directly as that always works.
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#define DEBUGWRITE(str) WriteFile(GetStdHandle(STD_ERROR_HANDLE), str, strlen(str), &nres, 0)
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#else
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#warning "You must alter this demo to define a DEBUGWRITE macro for your platform."
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#warning "Be careful of using C library functions as they sometimes crash if they are not expecting stack changes (if possible use a multi-thread aware C library)"
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#warning "You might flash LED's instead if that is better for your platform."
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#error "--"
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#endif
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/*
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* Thread function
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* Prints a message
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*/
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gThreadreturn Thread_function(void* param)
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{
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/* Cast the paramter into a gBool pointer so we can use it */
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gBool* doExit = (gBool*)param;
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/* Execute this until we shall be terminated */
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while (!*doExit) {
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DEBUGWRITE("Message from Thread\n");
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gfxSleepMilliseconds(500);
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}
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/* Don't return anything */
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return (gThreadreturn)0;
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}
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/*
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* Timer callback function
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* Will be called when timer expires/fires
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*/
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void timerCallback(void* param)
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{
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/* Cast the paramter into a gBool pointer so we can use it */
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gBool* threadExit = (gBool*)param;
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/* Ask the Thread to fall over the end */
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DEBUGWRITE("Closing thread!\n");
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*threadExit = gTrue;
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}
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/*
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* The main function
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*/
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int main(void)
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{
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gBool exitThread = gFalse;
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gfxInit();
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/* Initialize the timer */
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gtimerInit(>);
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/* Create a static thread from the default heap with normal priority.
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* We pass a the parameter to the thread which tells the thread whether to return or not
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*/
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thd = gfxThreadCreate(NULL, 2048, gThreadpriorityNormal, Thread_function, (void*)&exitThread);
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/* Start the timer. The callback function will be called once after 2000ms
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* We will pass the thread handle as a parameter so the timer can ask the thread to terminate
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*/
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gtimerStart(>, timerCallback, (void*)&exitThread, gFalse, 2000);
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while(1) {
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DEBUGWRITE("Message from main!\n");
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gfxSleepMilliseconds(500);
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}
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}
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