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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #ifndef PLATFORM_UTILS_H_ | 5 #ifndef PLATFORM_UTILS_H_ |
6 #define PLATFORM_UTILS_H_ | 6 #define PLATFORM_UTILS_H_ |
7 | 7 |
8 #include "platform/assert.h" | 8 #include "platform/assert.h" |
9 #include "platform/globals.h" | 9 #include "platform/globals.h" |
10 | 10 |
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72 } | 72 } |
73 | 73 |
74 template<typename T> | 74 template<typename T> |
75 static inline T* RoundUp(T* x, int n) { | 75 static inline T* RoundUp(T* x, int n) { |
76 return reinterpret_cast<T*>(RoundUp(reinterpret_cast<uword>(x), n)); | 76 return reinterpret_cast<T*>(RoundUp(reinterpret_cast<uword>(x), n)); |
77 } | 77 } |
78 | 78 |
79 static uint32_t RoundUpToPowerOfTwo(uint32_t x); | 79 static uint32_t RoundUpToPowerOfTwo(uint32_t x); |
80 static int CountOneBits(uint32_t x); | 80 static int CountOneBits(uint32_t x); |
81 | 81 |
| 82 static int CountTrailingZeros(uint32_t x); |
| 83 static int CountTrailingZeros(uint64_t x); |
| 84 |
82 // Computes a hash value for the given string. | 85 // Computes a hash value for the given string. |
83 static uint32_t StringHash(const char* data, int length); | 86 static uint32_t StringHash(const char* data, int length); |
84 | 87 |
85 // Computes a hash value for the given word. | 88 // Computes a hash value for the given word. |
86 static uint32_t WordHash(word key); | 89 static uint32_t WordHash(word key); |
87 | 90 |
88 // Check whether an N-bit two's-complement representation can hold value. | 91 // Check whether an N-bit two's-complement representation can hold value. |
89 template<typename T> | 92 template<typename T> |
90 static inline bool IsInt(int N, T value) { | 93 static inline bool IsInt(int N, T value) { |
91 ASSERT((0 < N) && | 94 ASSERT((0 < N) && |
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163 intptr_t length) { | 166 intptr_t length) { |
164 return offset >= 0 && | 167 return offset >= 0 && |
165 count >= 0 && | 168 count >= 0 && |
166 length >= 0 && | 169 length >= 0 && |
167 count <= (length - offset); | 170 count <= (length - offset); |
168 } | 171 } |
169 }; | 172 }; |
170 | 173 |
171 } // namespace dart | 174 } // namespace dart |
172 | 175 |
| 176 #if defined(TARGET_OS_LINUX) |
| 177 #include "platform/utils_linux.h" |
| 178 #elif defined(TARGET_OS_MACOS) |
| 179 #include "platform/utils_macos.h" |
| 180 #elif defined(TARGET_OS_WINDOWS) |
| 181 #include "platform/utils_win.h" |
| 182 #else |
| 183 #error Unknown target os. |
| 184 #endif |
| 185 |
173 #endif // PLATFORM_UTILS_H_ | 186 #endif // PLATFORM_UTILS_H_ |
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