93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/*
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* This file is subject to the terms of the GFX License. If a copy of
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* the license was not distributed with this file, you can obtain one at:
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*
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* http://ugfx.io/license.html
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*/
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/**
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* This threading implementation supports most 32 bit processors with or without an
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* underlying operating system. It uses cooperative multi-tasking. Be careful
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* when writing device drivers not to disturb the assumptions this creates by performing
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* call-backs from interrupt handlers to uGFX code unless you define the INTERRUPTS_OFF()
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* and INTERRUPTS_ON() macros.
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* It still requires some C runtime library support for the setjmp implementation...
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* setjmp() and longjmp() - for threading
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* memcpy() - for heap and threading
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*
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* You must also define the following routines in your own code so that timing functions will work...
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* gTicks gfxSystemTicks(void);
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* gTicks gfxMillisecondsToTicks(gDelay ms);
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*/
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#ifndef _GOS_X_THREADS_H
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#define _GOS_X_THREADS_H
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#if GOS_NEED_X_THREADS
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typedef gU32 gDelay;
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typedef gU32 gTicks;
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typedef short gSemcount;
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typedef int gThreadreturn;
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typedef int gThreadpriority;
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#define GFX_THREAD_FUNCTION(fnName, param) gThreadreturn fnName(void *param)
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#define GFX_THREAD_STACK(name, sz) gU8 name[(sz) & ~3];
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#define gfxThreadReturn(retval) return retval
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#define gDelayNone 0
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#define gDelayForever ((gDelay)-1)
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#define gSemMaxCount 0x7FFF
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#define gThreadpriorityLow 0
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#define gThreadpriorityNormal 1
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#define gThreadpriorityHigh 2
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typedef struct {
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gSemcount cnt;
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gSemcount limit;
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} gSem;
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typedef gU32 gMutex;
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typedef void * gThread;
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// Required timing functions - supplied by the user or the operating system
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gTicks gfxSystemTicks(void);
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gTicks gfxMillisecondsToTicks(gDelay ms);
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// Sleep Functions
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void gfxSleepMilliseconds(gDelay ms);
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void gfxSleepMicroseconds(gDelay ms);
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void gfxYield(void);
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// System Locking
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void gfxSystemLock(void);
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void gfxSystemUnlock(void);
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// Mutexes
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void gfxMutexInit(gMutex *pmutex);
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#define gfxMutexDestroy(pmutex)
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void gfxMutexEnter(gMutex *pmutex);
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void gfxMutexExit(gMutex *pmutex);
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// Semaphores
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void gfxSemInit(gSem *psem, gSemcount val, gSemcount limit);
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#define gfxSemDestroy(psem)
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gBool gfxSemWait(gSem *psem, gDelay ms);
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gBool gfxSemWaitI(gSem *psem);
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void gfxSemSignal(gSem *psem);
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void gfxSemSignalI(gSem *psem);
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// Threads
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gThread gfxThreadCreate(void *stackarea, gMemSize stacksz, gThreadpriority prio, GFX_THREAD_FUNCTION((*fn),p), void *param);
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#define gfxThreadClose(thread)
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gThreadreturn gfxThreadWait(gThread thread);
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gThread gfxThreadMe(void);
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/** The following is not part of the public ugfx API as some operating systems
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* simply do not provide this capability.
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* For RAW32 we need it anyway so we might as well declare it here.
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*/
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void gfxThreadExit(gThreadreturn ret);
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#endif /* GOS_NEED_X_THREADS */
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#endif /* _GOS_X_THREADS_H */
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