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105 lines
2.3 KiB
C
105 lines
2.3 KiB
C
/* ==== machdep.h ============================================================
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* Copyright (c) 1994 Chris Provenzano, proven@athena.mit.edu
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*
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* $Id$
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*
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*/
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#include <unistd.h>
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#include <setjmp.h>
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#include <sys/time.h>
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#include <sys/cdefs.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 0xff
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#define SEMAPHORE_TEST_AND_SET(lock) \
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({ \
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char *p = lock; \
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long temp; \
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\
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__asm__ volatile("ldstub %1,%0" \
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:"=r" (temp) \
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:"m" (*p) \
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:"memory"); \
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temp; \
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})
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#define SEMAPHORE_RESET(lock) \
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{ \
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__asm__ volatile("stb %1, %0" \
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:"=m" (*lock) \
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:"r" (SEMAPHORE_CLEAR) \
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:"memory"); \
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}
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/*
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* New types
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*/
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typedef char semaphore;
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/*
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* sigset_t macros
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*/
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#define SIG_ANY(sig) (sig)
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#define SIGMAX 31
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/*
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* New Strutures
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*/
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struct machdep_pthread {
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void *(*start_routine)(void *);
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void *start_argument;
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void *machdep_stack;
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struct itimerval machdep_timer;
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jmp_buf machdep_state;
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};
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/*
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* Static machdep_pthread initialization values.
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* For initial thread only.
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*/
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#define MACHDEP_PTHREAD_INIT \
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{ NULL, NULL, NULL, { { 0, 0 }, { 0, 100000 } }, 0 }
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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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/*
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* Some fd flag defines that are necessary to distinguish between posix
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* behavior and bsd4.3 behavior.
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*/
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#define __FD_NONBLOCK (O_NONBLOCK | O_NDELAY)
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/*
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* New functions
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*/
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__BEGIN_DECLS
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#if defined(PTHREAD_KERNEL)
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#define __machdep_stack_get(x) (x)->machdep_stack
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#define __machdep_stack_set(x, y) (x)->machdep_stack = y
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#define __machdep_stack_repl(x, y) \
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{ \
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if (stack = __machdep_stack_get(x)) { \
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__machdep_stack_free(stack); \
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} \
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__machdep_stack_set(x, y); \
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}
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void * __machdep_stack_alloc __P_((size_t));
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void __machdep_stack_free __P_((void *));
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int machdep_save_state __P_((void));
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#endif
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__END_DECLS
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