32 lines
750 B
C
32 lines
750 B
C
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/* ==== machdep.h ============================================================
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* Copyright (c) 1993 Chris Provenzano, proven@athena.mit.edu
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*
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*/
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#include <pthread/copyright.h>
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/*
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* The first machine dependent functions are the SEMAPHORES
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* needing the test and set instruction.
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*/
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#define SEMAPHORE_CLEAR 0
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#define SEMAPHORE_SET 1
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#define SEMAPHORE_TEST_AND_SET(lock) \
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({ \
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volatile long temp = SEMAPHORE_SET; \
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\
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__asm__("xchgl %0,(%2)" \
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:"=r" (temp) \
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:"0" (temp),"r" (lock)); \
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temp; \
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})
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#define SEMAPHORE_RESET(lock) *lock = SEMAPHORE_CLEAR
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/*
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* Minimum stack size
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*/
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#define PTHREAD_STACK_MIN 1024
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