sal/osl/w32/interlck.c

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   7  * OpenOffice.org - a multi-platform office productivity suite
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   9  * $RCSfile: interlck.c,v $
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  30
  31 #include "system.h"
  32
  33 #include <osl/interlck.h>
  34 #include <osl/diagnose.h>
  35
  36 extern int osl_isSingleCPU;
  37
  38 /* For all Intel x86 above x486 we use a spezial inline assembler implementation.
  39    The main reason is that WIN9? does not return the result of the operation.
  40    Instead there is only returned a value greater than zero is the increment
  41    result is greater than zero, but not the the result of the addition.
  42    For Windows NT the native function could be used, because the correct result
  43    is returned. Beacuse of simpler code maintance and performace reasons we use
  44    on every x86-Windows-Platform the inline assembler implementation.
  45 */
  46
  47 /*****************************************************************************/
  48 /* osl_incrementInterlockedCount */
  49 /*****************************************************************************/
  50 oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount)
  51 #ifdef _M_IX86
  52 #ifdef __MINGW32__
  53 {
  54     asm
  55     (
  56      "  movl        %0, %%ecx\n"
  57      "          movl        $1, %%eax\n"
  58      "  movl        %1, %%edx\n"
  59      "  cmpl        $0, %%edx\n"
  60      "  je          1f\n"
  61      "          xadd        %%eax, (%%ecx)\n"
  62      "  jmp         2f\n"
  63      "1:\n"
  64      "          lock xadd   %%eax, (%%ecx)\n"
  65      "2:\n"
  66      "          incl        %%eax\n"
  67      ::"m"(pCount),"m"(osl_isSingleCPU)
  68     );
  69 }
  70 #else
  71 #pragma warning(disable: 4035)
  72 {
  73     __asm
  74     {
  75         mov         ecx, pCount
  76         mov         eax, 1
  77         mov         edx, osl_isSingleCPU
  78         cmp         edx, 0
  79         je          is_not_single
  80         xadd        dword ptr [ecx],eax
  81         jmp         cont
  82     is_not_single:
  83         lock xadd   dword ptr [ecx],eax
  84     cont:
  85         inc         eax
  86     }
  87 }
  88 #pragma warning(default: 4035)
  89 #endif
  90 #else
  91 #pragma message("WARNING: Using system InterlockedIncrement")
  92 {
  93     return (InterlockedIncrement(pCount));
  94 }
  95 #endif
  96
  97 /*****************************************************************************/
  98 /* osl_decrementInterlockedCount */
  99 /*****************************************************************************/
 100 oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount)
 101 #ifdef _M_IX86
 102 #ifdef __MINGW32__
 103 {
 104     asm
 105     (
 106      "  movl        %0, %%ecx\n"
 107      "          orl         $-1, %%eax\n"
 108      "  movl        %1, %%edx\n"
 109      "  cmpl        $0, %%edx\n"
 110      "  je          1f\n"
 111      "          xadd        %%eax, (%%ecx)\n"
 112      "  jmp         2f\n"
 113      "1:\n"
 114      "          lock xadd   %%eax, (%%ecx)\n"
 115      "2:\n"
 116      "          decl        %%eax\n"
 117      ::"m"(pCount),"m"(osl_isSingleCPU)
 118     );
 119 }
 120 #else
 121 #pragma warning(disable: 4035)
 122 {
 123     __asm
 124     {
 125         mov         ecx, pCount
 126         or          eax, -1
 127         mov         edx, osl_isSingleCPU
 128         cmp         edx, 0
 129         je          is_not_single
 130         xadd        dword ptr [ecx],eax
 131         jmp         cont
 132     is_not_single:
 133         lock xadd   dword ptr [ecx],eax
 134     cont:
 135         dec         eax
 136     }
 137 }
 138 #pragma warning(default: 4035)
 139 #endif
 140 #else
 141 #pragma message("WARNING: Using system InterlockedDecrement")
 142 {
 143     return (InterlockedDecrement(pCount));
 144 }
 145 #endif