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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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44 // Although there are currently no compiler enforcement, you are encouraged | 44 // Although there are currently no compiler enforcement, you are encouraged |
45 // to use these. | 45 // to use these. |
46 // | 46 // |
47 | 47 |
48 #ifndef V8_ATOMICOPS_H_ | 48 #ifndef V8_ATOMICOPS_H_ |
49 #define V8_ATOMICOPS_H_ | 49 #define V8_ATOMICOPS_H_ |
50 | 50 |
51 #include "../include/v8.h" | 51 #include "../include/v8.h" |
52 #include "globals.h" | 52 #include "globals.h" |
53 | 53 |
| 54 #if defined(_WIN32) && defined(V8_HOST_ARCH_64_BIT) |
| 55 // windows.h #defines this (only on x64). This causes problems because the |
| 56 // public API also uses MemoryBarrier at the public name for this fence. So, on |
| 57 // X64, undef it, and call its documented |
| 58 // (http://msdn.microsoft.com/en-us/library/windows/desktop/ms684208.aspx) |
| 59 // implementation directly. |
| 60 #undef MemoryBarrier |
| 61 #endif |
| 62 |
54 namespace v8 { | 63 namespace v8 { |
55 namespace internal { | 64 namespace internal { |
56 | 65 |
57 typedef int32_t Atomic32; | 66 typedef int32_t Atomic32; |
58 #ifdef V8_HOST_ARCH_64_BIT | 67 #ifdef V8_HOST_ARCH_64_BIT |
59 // We need to be able to go between Atomic64 and AtomicWord implicitly. This | 68 // We need to be able to go between Atomic64 and AtomicWord implicitly. This |
60 // means Atomic64 and AtomicWord should be the same type on 64-bit. | 69 // means Atomic64 and AtomicWord should be the same type on 64-bit. |
61 #if defined(__ILP32__) || defined(__APPLE__) | 70 #if defined(__ILP32__) |
62 // MacOS is an exception to the implicit conversion rule above, | |
63 // because it uses long for intptr_t. | |
64 typedef int64_t Atomic64; | 71 typedef int64_t Atomic64; |
65 #else | 72 #else |
66 typedef intptr_t Atomic64; | 73 typedef intptr_t Atomic64; |
67 #endif | 74 #endif |
68 #endif | 75 #endif |
69 | 76 |
70 // Use AtomicWord for a machine-sized pointer. It will use the Atomic32 or | 77 // Use AtomicWord for a machine-sized pointer. It will use the Atomic32 or |
71 // Atomic64 routines below, depending on your architecture. | 78 // Atomic64 routines below, depending on your architecture. |
72 #if defined(__OpenBSD__) && defined(__i386__) | |
73 typedef Atomic32 AtomicWord; | |
74 #else | |
75 typedef intptr_t AtomicWord; | 79 typedef intptr_t AtomicWord; |
76 #endif | |
77 | 80 |
78 // Atomically execute: | 81 // Atomically execute: |
79 // result = *ptr; | 82 // result = *ptr; |
80 // if (*ptr == old_value) | 83 // if (*ptr == old_value) |
81 // *ptr = new_value; | 84 // *ptr = new_value; |
82 // return result; | 85 // return result; |
83 // | 86 // |
84 // I.e., replace "*ptr" with "new_value" if "*ptr" used to be "old_value". | 87 // I.e., replace "*ptr" with "new_value" if "*ptr" used to be "old_value". |
85 // Always return the old value of "*ptr" | 88 // Always return the old value of "*ptr" |
86 // | 89 // |
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148 Atomic64 Release_Load(volatile const Atomic64* ptr); | 151 Atomic64 Release_Load(volatile const Atomic64* ptr); |
149 #endif // V8_HOST_ARCH_64_BIT | 152 #endif // V8_HOST_ARCH_64_BIT |
150 | 153 |
151 } } // namespace v8::internal | 154 } } // namespace v8::internal |
152 | 155 |
153 // Include our platform specific implementation. | 156 // Include our platform specific implementation. |
154 #if defined(THREAD_SANITIZER) | 157 #if defined(THREAD_SANITIZER) |
155 #include "atomicops_internals_tsan.h" | 158 #include "atomicops_internals_tsan.h" |
156 #elif defined(_MSC_VER) && (V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64) | 159 #elif defined(_MSC_VER) && (V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64) |
157 #include "atomicops_internals_x86_msvc.h" | 160 #include "atomicops_internals_x86_msvc.h" |
158 #elif defined(__APPLE__) && (V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64) | 161 #elif defined(__APPLE__) |
159 #include "atomicops_internals_x86_macosx.h" | 162 #include "atomicops_internals_mac.h" |
160 #elif defined(__GNUC__) && (V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64) | |
161 #include "atomicops_internals_x86_gcc.h" | |
162 #elif defined(__GNUC__) && V8_HOST_ARCH_A64 | 163 #elif defined(__GNUC__) && V8_HOST_ARCH_A64 |
163 #include "atomicops_internals_a64_gcc.h" | 164 #include "atomicops_internals_a64_gcc.h" |
164 #elif defined(__GNUC__) && V8_HOST_ARCH_ARM | 165 #elif defined(__GNUC__) && V8_HOST_ARCH_ARM |
165 #include "atomicops_internals_arm_gcc.h" | 166 #include "atomicops_internals_arm_gcc.h" |
| 167 #elif defined(__GNUC__) && (V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64) |
| 168 #include "atomicops_internals_x86_gcc.h" |
166 #elif defined(__GNUC__) && V8_HOST_ARCH_MIPS | 169 #elif defined(__GNUC__) && V8_HOST_ARCH_MIPS |
167 #include "atomicops_internals_mips_gcc.h" | 170 #include "atomicops_internals_mips_gcc.h" |
168 #else | 171 #else |
169 #error "Atomic operations are not supported on your platform" | 172 #error "Atomic operations are not supported on your platform" |
170 #endif | 173 #endif |
171 | 174 |
| 175 // On some platforms we need additional declarations to make |
| 176 // AtomicWord compatible with our other Atomic* types. |
| 177 #if defined(__APPLE__) || defined(__OpenBSD__) |
| 178 #include "atomicops_internals_atomicword_compat.h" |
| 179 #endif |
| 180 |
172 #endif // V8_ATOMICOPS_H_ | 181 #endif // V8_ATOMICOPS_H_ |
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