$NetBSD: patch-ai,v 1.3 2001/01/10 06:03:15 briggs Exp $

*** /dev/null	Wed Dec 31 19:00:00 1969
--- mit-pthreads/machdep/engine-powerpc-netbsd.h	Tue Jan  9 22:35:36 2001
***************
*** 0 ****
--- 1,109 ----
+ /* ==== machdep.h ============================================================
+  * Copyright (c) 1994 Chris Provenzano (proven@athena.mit.edu) and
+  * Ken Raeburn (raeburn@mit.edu).
+  *
+  * engine-alpha-osf1.h,v 1.4.4.1 1995/12/13 05:41:42 proven Exp
+  *
+  */
+ 
+ #include <unistd.h>
+ #include <setjmp.h>
+ #include <sys/time.h>
+ #include <sys/cdefs.h>
+ #include <sys/signal.h>  /* for _NSIG */
+ 
+ /*
+  * The first machine dependent functions are the SEMAPHORES
+  * needing the test and set instruction.
+  */
+ #define SEMAPHORE_CLEAR 0
+ #define SEMAPHORE_SET   0xffff
+ 
+ #define SEMAPHORE_TEST_AND_SET(lock)            \
+ ({                                              \
+         volatile long t1, temp = SEMAPHORE_SET; \
+         __asm__ volatile(                       \
+ 	  "1: lwarx  %0,0,%1;			\
+ 	      cmpwi  %0, 0;                     \
+ 	      bne    2f;                        \
+ 	      stwcx. %2,0,%1;                   \
+ 	      bne-   1b;                        \
+ 	   2: "                                 \
+           :"=r" (t1)                            \
+           :"m" (lock), "r" (temp));             \
+         t1;                                     \
+ })
+ 
+ #define SEMAPHORE_RESET(lock)           *lock = SEMAPHORE_CLEAR
+ 
+ /*
+  * New types
+  */
+ typedef int semaphore;
+ 
+ /*
+  * sigset_t macros
+  */
+ #define        SIG_ANY(sig)            (sig)
+ #define        SIGMAX                  (_NSIG-1)
+ 
+ /*
+  * New Strutures
+  */
+ struct machdep_pthread {
+     void                       *(*start_routine)(void *);
+     void                       *start_argument;
+     void                       *machdep_stack;
+     struct itimerval           machdep_timer;
+     jmp_buf	               machdep_istate;
+     unsigned long              machdep_fstate[66];
+ 				/* 64-bit fp regs 0-31 + fpscr */
+ 				/* We pretend the fpscr is 64 bits */
+ };
+ 
+ /*
+  * Static machdep_pthread initialization values.
+  * For initial thread only.
+  */
+ #define MACHDEP_PTHREAD_INIT    \
+        { NULL, NULL, NULL, { { 0, 0 }, { 0, 100000 } }, { 0 }, { 0 } }
+ 
+ /*
+  * Minimum stack size
+  */
+ #define PTHREAD_STACK_MIN      2048
+ 
+ /*
+  * 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);                              \
+ }
+ 
+ int machdep_save_state(void);
+ 
+ void __machdep_save_fp_state(unsigned long *);
+ void __machdep_restore_fp_state(unsigned long *);
+ void *__machdep_stack_alloc(size_t);
+ void __machdep_stack_free(void *);
+ 
+ #endif
+ 
+ __END_DECLS