1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 #include "system.h" 25 26 #include <osl/interlck.h> 27 #include <osl/diagnose.h> 28 29 extern int osl_isSingleCPU; 30 31 /* For all Intel x86 above x486 we use a spezial inline assembler implementation. 32 The main reason is that WIN9? does not return the result of the operation. 33 Instead there is only returned a value greater than zero is the increment 34 result is greater than zero, but not the the result of the addition. 35 For Windows NT the native function could be used, because the correct result 36 is returned. Because of simpler code maintenance and performace reasons we use 37 on every x86-Windows-Platform the inline assembler implementation. 38 */ 39 40 /*****************************************************************************/ 41 /* osl_incrementInterlockedCount */ 42 /*****************************************************************************/ 43 oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount) 44 #ifdef _M_IX86 45 #ifdef __MINGW32__ 46 { 47 asm 48 ( 49 " movl %0, %%ecx\n" 50 " movl $1, %%eax\n" 51 " movl %1, %%edx\n" 52 " cmpl $0, %%edx\n" 53 " je 1f\n" 54 " xadd %%eax, (%%ecx)\n" 55 " jmp 2f\n" 56 "1:\n" 57 " lock xadd %%eax, (%%ecx)\n" 58 "2:\n" 59 " incl %%eax\n" 60 ::"m"(pCount),"m"(osl_isSingleCPU) 61 ); 62 } 63 #else 64 #pragma warning(disable: 4035) 65 { 66 __asm 67 { 68 mov ecx, pCount 69 mov eax, 1 70 mov edx, osl_isSingleCPU 71 cmp edx, 0 72 je is_not_single 73 xadd dword ptr [ecx],eax 74 jmp cont 75 is_not_single: 76 lock xadd dword ptr [ecx],eax 77 cont: 78 inc eax 79 } 80 } 81 #pragma warning(default: 4035) 82 #endif 83 #else 84 #pragma message("WARNING: Using system InterlockedIncrement") 85 { 86 return (InterlockedIncrement(pCount)); 87 } 88 #endif 89 90 /*****************************************************************************/ 91 /* osl_decrementInterlockedCount */ 92 /*****************************************************************************/ 93 oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount) 94 #ifdef _M_IX86 95 #ifdef __MINGW32__ 96 { 97 asm 98 ( 99 " movl %0, %%ecx\n" 100 " orl $-1, %%eax\n" 101 " movl %1, %%edx\n" 102 " cmpl $0, %%edx\n" 103 " je 1f\n" 104 " xadd %%eax, (%%ecx)\n" 105 " jmp 2f\n" 106 "1:\n" 107 " lock xadd %%eax, (%%ecx)\n" 108 "2:\n" 109 " decl %%eax\n" 110 ::"m"(pCount),"m"(osl_isSingleCPU) 111 ); 112 } 113 #else 114 #pragma warning(disable: 4035) 115 { 116 __asm 117 { 118 mov ecx, pCount 119 or eax, -1 120 mov edx, osl_isSingleCPU 121 cmp edx, 0 122 je is_not_single 123 xadd dword ptr [ecx],eax 124 jmp cont 125 is_not_single: 126 lock xadd dword ptr [ecx],eax 127 cont: 128 dec eax 129 } 130 } 131 #pragma warning(default: 4035) 132 #endif 133 #else 134 #pragma message("WARNING: Using system InterlockedDecrement") 135 { 136 return (InterlockedDecrement(pCount)); 137 } 138 #endif 139