reactos/ntoskrnl/rtl/interlck.c

   1 /* $Id: interlck.c,v 1.9 2001/07/06 21:30:33 ekohl Exp $
   2  *
   3  * reactos/ntoskrnl/rtl/interlck.c
   4  *
   5  */
   6 #include <reactos/config.h>
   7 #include <ntos.h>
   8 #include <internal/debug.h>
   9
  10 #define USE_FASTCALL
  11
  12 /**********************************************************************
  13  * FASTCALL: @InterlockedIncrement@4
  14  * STDCALL : _InterlockedIncrement@4
  15  */
  16 LONG FASTCALL
  17 InterlockedIncrement(PLONG Addend);
  18 /*
  19  * FUNCTION: Increments a caller supplied variable of type LONG as an
  20  * atomic operation
  21  * ARGUMENTS;
  22  *     Addend = Points to a variable whose value is to be increment
  23  * RETURNS: The incremented value
  24  */
  25
  26 __asm__("\n\t.global @InterlockedIncrement@4\n\t"
  27         "@InterlockedIncrement@4:\n\t"
  28         "movl $1,%eax\n\t"
  29         "xaddl %eax,(%ecx)\n\t"
  30         "incl %eax\n\t"
  31         "ret\n\t");
  32
  33
  34 /**********************************************************************
  35  * FASTCALL: @InterlockedDecrement@4
  36  * STDCALL : _InterlockedDecrement@4
  37  */
  38 LONG FASTCALL
  39 InterlockedDecrement(PLONG Addend);
  40
  41 __asm__("\n\t.global @InterlockedDecrement@4\n\t"
  42         "@InterlockedDecrement@4:\n\t"
  43         "movl $-1,%eax\n\t"
  44         "xaddl %eax,(%ecx)\n\t"
  45         "decl %eax\n\t"
  46         "ret\n\t");
  47
  48
  49 /**********************************************************************
  50  * FASTCALL: @InterlockedExchange@8
  51  * STDCALL : _InterlockedExchange@8
  52  */
  53
  54 LONG FASTCALL
  55 InterlockedExchange(PLONG Target,
  56                     LONG Value);
  57
  58 __asm__("\n\t.global @InterlockedExchange@8\n\t"
  59         "@InterlockedExchange@8:\n\t"
  60         "movl (%ecx),%eax\n"
  61         "xchgl %edx,(%ecx)\n\t"
  62         "ret\n\t");
  63
  64
  65 /**********************************************************************
  66  * FASTCALL: @InterlockedExchangeAdd@8
  67  * STDCALL: _InterlockedExchangeAdd@8
  68  */
  69 LONG FASTCALL
  70 InterlockedExchangeAdd(PLONG Addend,
  71                        LONG Value);
  72
  73 __asm__("\n\t.global @InterlockedExchangeAdd@8\n\t"
  74         "@InterlockedExchangeAdd@8:\n\t"
  75         "xaddl %edx,(%ecx)\n\t"
  76         "movl %edx,%eax\n\t"
  77         "ret\n\t");
  78
  79
  80 /**********************************************************************
  81  * FASTCALL: @InterlockedCompareExchange@12
  82  * STDCALL: _InterlockedCompareExchange@12
  83  */
  84 PVOID FASTCALL
  85 InterlockedCompareExchange(PVOID *Destination,
  86                            PVOID Exchange,
  87                            PVOID Comperand);
  88
  89 __asm__("\n\t.global @InterlockedCompareExchange@12\n\t"
  90         "@InterlockedCompareExchange@12:\n\t"
  91         "movl 4(%esp),%eax\n\t"
  92         "cmpxchg %edx,(%ecx)\n\t"
  93         "ret $4\n\t");
  94
  95 /* EOF */