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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
/**
* This threading implementation supports most 32 bit processors with or without an
* underlying operating system. It uses cooperative multi-tasking. Be careful
* when writing device drivers not to disturb the assumptions this creates by performing
* call-backs from interrupt handlers to uGFX code unless you define the INTERRUPTS_OFF()
* and INTERRUPTS_ON() macros.
* It still requires some C runtime library support for the setjmp implementation...
* setjmp() and longjmp() - for threading
* memcpy() - for heap and threading
*
* You must also define the following routines in your own code so that timing functions will work...
* systemticks_t gfxSystemTicks(void);
* systemticks_t gfxMillisecondsToTicks(delaytime_t ms);
*/
#ifndef _GOS_X_THREADS_H
#define _GOS_X_THREADS_H
#if GOS_NEED_X_THREADS
typedef uint32_t delaytime_t;
typedef uint32_t systemticks_t;
typedef short semcount_t;
typedef int threadreturn_t;
typedef int threadpriority_t;
#define DECLARE_THREAD_FUNCTION(fnName, param) threadreturn_t fnName(void *param)
#define DECLARE_THREAD_STACK(name, sz) uint8_t name[(sz) & ~3];
#define THREAD_RETURN(retval) return retval
#define TIME_IMMEDIATE 0
#define TIME_INFINITE ((delaytime_t)-1)
#define MAX_SEMAPHORE_COUNT 0x7FFF
#define LOW_PRIORITY 0
#define NORMAL_PRIORITY 1
#define HIGH_PRIORITY 2
typedef struct {
semcount_t cnt;
semcount_t limit;
} gfxSem;
typedef uint32_t gfxMutex;
typedef void * gfxThreadHandle;
// Required timing functions - supplied by the user or the operating system
systemticks_t gfxSystemTicks(void);
systemticks_t gfxMillisecondsToTicks(delaytime_t ms);
// Sleep Functions
void gfxSleepMilliseconds(delaytime_t ms);
void gfxSleepMicroseconds(delaytime_t ms);
void gfxYield(void);
// System Locking
void gfxSystemLock(void);
void gfxSystemUnlock(void);
// Mutexes
void gfxMutexInit(gfxMutex *pmutex);
#define gfxMutexDestroy(pmutex)
void gfxMutexEnter(gfxMutex *pmutex);
void gfxMutexExit(gfxMutex *pmutex);
// Semaphores
void gfxSemInit(gfxSem *psem, semcount_t val, semcount_t limit);
#define gfxSemDestroy(psem)
gBool gfxSemWait(gfxSem *psem, delaytime_t ms);
gBool gfxSemWaitI(gfxSem *psem);
void gfxSemSignal(gfxSem *psem);
void gfxSemSignalI(gfxSem *psem);
// Threads
gfxThreadHandle gfxThreadCreate(void *stackarea, size_t stacksz, threadpriority_t prio, DECLARE_THREAD_FUNCTION((*fn),p), void *param);
#define gfxThreadClose(thread)
threadreturn_t gfxThreadWait(gfxThreadHandle thread);
gfxThreadHandle gfxThreadMe(void);
/** The following is not part of the public ugfx API as some operating systems
* simply do not provide this capability.
* For RAW32 we need it anyway so we might as well declare it here.
*/
void gfxThreadExit(threadreturn_t ret);
#endif /* GOS_NEED_X_THREADS */
#endif /* _GOS_X_THREADS_H */
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