alpha/threads.h

   1 /*
   2  * i386/threads.h
   3  * i386 threading information.
   4  *
   5  * Copyright (c) 1996 T. J. Wilkinson & Associates, London, UK.
   6  *
   7  * See the file "license.terms" for information on usage and redistribution
   8  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
   9  *
  10  * Copyright (c) 1997 A. Krall, R. Grafl, M. Gschwind, M. Probst
  11  *
  12  * See file COPYRIGHT for information on usage and disclaimer of warranties
  13  *
  14  * Written by Tim Wilkinson <tim@tjwassoc.demon.co.uk>, 1996.
  15  */
  16
  17 #ifndef __alpha_threads_h
  18 #define __alpha_threads_h
  19
  20 /**/
  21 /* Thread handling */
  22 /**/
  23
  24 #include "../threads/thread.h"
  25
  26 void perform_alpha_threadswitch (u1 **from, u1 **to, u1 **stackTop);
  27 u1* initialize_thread_stack (void *func, u1 *stack);
  28 void asm_switchstackandcall (void *stack, void *func);
  29
  30 #define THREADSTACKSIZE         (32 * 1024)
  31
  32 #define THREADSWITCH(to, from)     perform_alpha_threadswitch(&(from)->restorePoint,\
  33                                                               &(to)->restorePoint, &(from)->usedStackTop)
  34
  35 #define THREADINIT(to, func)       (to)->restorePoint = \
  36                                      initialize_thread_stack((u1*)(func), \
  37                                                              (to)->stackEnd)
  38
  39 #define THREADINFO(ee)                                          \
  40                 do {                                            \
  41                         (ee)->restorePoint = 0;                 \
  42                         (ee)->flags = THREAD_FLAGS_NOSTACKALLOC;\
  43                 } while(0)
  44
  45 /*
  46                         void* ptr;                              \
  47                         asm("addq $30,$31,%0" : "=r" (ptr));    \
  48                         (ee)->stackEnd = ptr;                   \
  49                         (ee)->stackBase = (ee)->stackEnd - threadStackSize;\
  50 */
  51
  52 /*
  53 #define THREADFRAMES(tid, cnt)                                  \
  54                 do {                                            \
  55                         void** ptr;                             \
  56                         cnt = 0;                                \
  57                         if (tid == currentThread) {             \
  58                                 asm("movl %%ebp,%0" : "=r" (ptr));\
  59                         }                                       \
  60                         else {                                  \
  61                                 ptr = ((void***)tid->PrivateInfo->restorePoint)[2];\
  62                         }                                       \
  63                         while (*ptr != 0) {                     \
  64                                 cnt++;                          \
  65                                 ptr = (void**)*ptr;             \
  66                         }                                       \
  67                 } while (0)
  68 */
  69
  70 #endif