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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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62 // MacOS is an exception to the implicit conversion rule above, | 62 // MacOS is an exception to the implicit conversion rule above, |
63 // because it uses long for intptr_t. | 63 // because it uses long for intptr_t. |
64 typedef int64_t Atomic64; | 64 typedef int64_t Atomic64; |
65 #else | 65 #else |
66 typedef intptr_t Atomic64; | 66 typedef intptr_t Atomic64; |
67 #endif | 67 #endif |
68 #endif | 68 #endif |
69 | 69 |
70 // Use AtomicWord for a machine-sized pointer. It will use the Atomic32 or | 70 // Use AtomicWord for a machine-sized pointer. It will use the Atomic32 or |
71 // Atomic64 routines below, depending on your architecture. | 71 // Atomic64 routines below, depending on your architecture. |
72 #if defined(__OpenBSD__) && defined(__i386__) | |
73 typedef Atomic32 AtomicWord; | |
74 #else | |
75 typedef intptr_t AtomicWord; | 72 typedef intptr_t AtomicWord; |
76 #endif | |
77 | 73 |
78 // Atomically execute: | 74 // Atomically execute: |
79 // result = *ptr; | 75 // result = *ptr; |
80 // if (*ptr == old_value) | 76 // if (*ptr == old_value) |
81 // *ptr = new_value; | 77 // *ptr = new_value; |
82 // return result; | 78 // return result; |
83 // | 79 // |
84 // I.e., replace "*ptr" with "new_value" if "*ptr" used to be "old_value". | 80 // I.e., replace "*ptr" with "new_value" if "*ptr" used to be "old_value". |
85 // Always return the old value of "*ptr" | 81 // Always return the old value of "*ptr" |
86 // | 82 // |
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162 #include "atomicops_internals_x86_gcc.h" | 158 #include "atomicops_internals_x86_gcc.h" |
163 #elif defined(__GNUC__) && defined(V8_HOST_ARCH_ARM) | 159 #elif defined(__GNUC__) && defined(V8_HOST_ARCH_ARM) |
164 #include "atomicops_internals_arm_gcc.h" | 160 #include "atomicops_internals_arm_gcc.h" |
165 #elif defined(__GNUC__) && defined(V8_HOST_ARCH_MIPS) | 161 #elif defined(__GNUC__) && defined(V8_HOST_ARCH_MIPS) |
166 #include "atomicops_internals_mips_gcc.h" | 162 #include "atomicops_internals_mips_gcc.h" |
167 #else | 163 #else |
168 #error "Atomic operations are not supported on your platform" | 164 #error "Atomic operations are not supported on your platform" |
169 #endif | 165 #endif |
170 | 166 |
171 #endif // V8_ATOMICOPS_H_ | 167 #endif // V8_ATOMICOPS_H_ |
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