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/* ==== machdep.h ============================================================
* Copyright (c) 1993 Chris Provenzano, proven@athena.mit.edu
*
* $Id$
*
*/
#include <unistd.h>
#include <setjmp.h>
#include <sys/time.h>
/*
* The first machine dependent functions are the SEMAPHORES
* needing the test and set instruction.
*/
#define SEMAPHORE_CLEAR 0
#define SEMAPHORE_SET 1
#define SEMAPHORE_TEST_AND_SET(lock) \
({ \
long temp = SEMAPHORE_SET; \
\
__asm__ volatile ("xchgl %0,(%2)" \
:"=r" (temp) \
:"0" (temp),"r" (lock)); \
temp; \
})
#define SEMAPHORE_RESET(lock) *lock = SEMAPHORE_CLEAR
/*
* New types
*/
typedef long semaphore;
/*
* sigset_t macros
*/
#define SIG_ANY(sig) (sig)
#define SIGMAX 31
/*
* New Strutures
*/
struct machdep_pthread {
void *(*start_routine)(void *);
void *start_argument;
void *machdep_stack;
struct itimerval machdep_timer;
jmp_buf machdep_state;
char machdep_float_state[108];
};
/*
* Static machdep_pthread initialization values.
* For initial thread only.
*/
#define MACHDEP_PTHREAD_INIT \
{ NULL, NULL, NULL, { { 0, 0 }, { 0, 100000 } }, 0 }
/*
* Minimum stack size
*/
#define PTHREAD_STACK_MIN 1024
/*
* Some fd flag defines that are necessary to distinguish between posix
* behavior and bsd4.3 behavior.
*/
#define __FD_NONBLOCK O_NONBLOCK
/*
* New functions
*/
__BEGIN_DECLS
#if defined(PTHREAD_KERNEL)
#define __machdep_stack_get(x) (x)->machdep_stack
#define __machdep_stack_set(x, y) (x)->machdep_stack = y
#define __machdep_stack_repl(x, y) \
{ \
if (stack = __machdep_stack_get(x)) { \
__machdep_stack_free(stack); \
} \
__machdep_stack_set(x, y); \
}
void * __machdep_stack_alloc __P_((size_t));
void __machdep_stack_free __P_((void *));
int machdep_save_state __P_((void));
#endif
__END_DECLS
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