sal/osl/w32/interlck.c

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  27
  28 #include "system.h"
  29
  30 #include <osl/interlck.h>
  31 #include <osl/diagnose.h>
  32
  33 extern int osl_isSingleCPU;
  34
  35 /* For all Intel x86 above x486 we use a spezial inline assembler implementation.
  36    The main reason is that WIN9? does not return the result of the operation.
  37    Instead there is only returned a value greater than zero is the increment
  38    result is greater than zero, but not the the result of the addition.
  39    For Windows NT the native function could be used, because the correct result
  40    is returned. Beacuse of simpler code maintance and performace reasons we use
  41    on every x86-Windows-Platform the inline assembler implementation.
  42 */
  43
  44 /*****************************************************************************/
  45 /* osl_incrementInterlockedCount */
  46 /*****************************************************************************/
  47 oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount)
  48 #ifdef _M_IX86
  49 #ifdef __MINGW32__
  50 {
  51     asm
  52     (
  53      "  movl        %0, %%ecx\n"
  54      "      movl        $1, %%eax\n"
  55      "  movl        %1, %%edx\n"
  56      "  cmpl        $0, %%edx\n"
  57      "  je          1f\n"
  58      "      xadd        %%eax, (%%ecx)\n"
  59      "  jmp         2f\n"
  60      "1:\n"
  61      "      lock xadd   %%eax, (%%ecx)\n"
  62      "2:\n"
  63      "      incl        %%eax\n"
  64      ::"m"(pCount),"m"(osl_isSingleCPU)
  65     );
  66 }
  67 #else
  68 #pragma warning(disable: 4035)
  69 {
  70     __asm
  71     {
  72         mov         ecx, pCount
  73         mov         eax, 1
  74         mov         edx, osl_isSingleCPU
  75         cmp         edx, 0
  76         je          is_not_single
  77         xadd        dword ptr [ecx],eax
  78         jmp         cont
  79     is_not_single:
  80         lock xadd   dword ptr [ecx],eax
  81     cont:
  82         inc         eax
  83     }
  84 }
  85 #pragma warning(default: 4035)
  86 #endif
  87 #else
  88 #pragma message("WARNING: Using system InterlockedIncrement")
  89 {
  90     return (InterlockedIncrement(pCount));
  91 }
  92 #endif
  93
  94 /*****************************************************************************/
  95 /* osl_decrementInterlockedCount */
  96 /*****************************************************************************/
  97 oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount)
  98 #ifdef _M_IX86
  99 #ifdef __MINGW32__
 100 {
 101     asm
 102     (
 103      "  movl        %0, %%ecx\n"
 104      "      orl         $-1, %%eax\n"
 105      "  movl        %1, %%edx\n"
 106      "  cmpl        $0, %%edx\n"
 107      "  je          1f\n"
 108      "      xadd        %%eax, (%%ecx)\n"
 109      "  jmp         2f\n"
 110      "1:\n"
 111      "      lock xadd   %%eax, (%%ecx)\n"
 112      "2:\n"
 113      "      decl        %%eax\n"
 114      ::"m"(pCount),"m"(osl_isSingleCPU)
 115     );
 116 }
 117 #else
 118 #pragma warning(disable: 4035)
 119 {
 120     __asm
 121     {
 122         mov         ecx, pCount
 123         or          eax, -1
 124         mov         edx, osl_isSingleCPU
 125         cmp         edx, 0
 126         je          is_not_single
 127         xadd        dword ptr [ecx],eax
 128         jmp         cont
 129     is_not_single:
 130         lock xadd   dword ptr [ecx],eax
 131     cont:
 132         dec         eax
 133     }
 134 }
 135 #pragma warning(default: 4035)
 136 #endif
 137 #else
 138 #pragma message("WARNING: Using system InterlockedDecrement")
 139 {
 140     return (InterlockedDecrement(pCount));
 141 }
 142 #endif