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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // This module contains the platform-specific code. This make the rest of the | 5 // This module contains the platform-specific code. This make the rest of the |
6 // code less dependent on operating system, compilers and runtime libraries. | 6 // code less dependent on operating system, compilers and runtime libraries. |
7 // This module does specifically not deal with differences between different | 7 // This module does specifically not deal with differences between different |
8 // processor architecture. | 8 // processor architecture. |
9 // The platform classes have the same definition for all platforms. The | 9 // The platform classes have the same definition for all platforms. The |
10 // implementation for a particular platform is put in platform_<os>.cc. | 10 // implementation for a particular platform is put in platform_<os>.cc. |
11 // The build system then uses the implementation for the target platform. | 11 // The build system then uses the implementation for the target platform. |
12 // | 12 // |
13 // This design has been chosen because it is simple and fast. Alternatively, | 13 // This design has been chosen because it is simple and fast. Alternatively, |
14 // the platform dependent classes could have been implemented using abstract | 14 // the platform dependent classes could have been implemented using abstract |
15 // superclasses with virtual methods and having specializations for each | 15 // superclasses with virtual methods and having specializations for each |
16 // platform. This design was rejected because it was more complicated and | 16 // platform. This design was rejected because it was more complicated and |
17 // slower. It would require factory methods for selecting the right | 17 // slower. It would require factory methods for selecting the right |
18 // implementation and the overhead of virtual methods for performance | 18 // implementation and the overhead of virtual methods for performance |
19 // sensitive like mutex locking/unlocking. | 19 // sensitive like mutex locking/unlocking. |
20 | 20 |
21 #ifndef V8_BASE_PLATFORM_PLATFORM_H_ | 21 #ifndef V8_BASE_PLATFORM_PLATFORM_H_ |
22 #define V8_BASE_PLATFORM_PLATFORM_H_ | 22 #define V8_BASE_PLATFORM_PLATFORM_H_ |
23 | 23 |
24 #include <cstdarg> | 24 #include <cstdarg> |
25 #include <string> | 25 #include <string> |
26 #include <vector> | 26 #include <vector> |
27 | 27 |
28 #include "src/base/build_config.h" | 28 #include "src/base/build_config.h" |
| 29 #include "src/base/compiler-specific.h" |
29 #include "src/base/platform/mutex.h" | 30 #include "src/base/platform/mutex.h" |
30 #include "src/base/platform/semaphore.h" | 31 #include "src/base/platform/semaphore.h" |
31 | 32 |
32 #if V8_OS_QNX | 33 #if V8_OS_QNX |
33 #include "src/base/qnx-math.h" | 34 #include "src/base/qnx-math.h" |
34 #endif | 35 #endif |
35 | 36 |
36 namespace v8 { | 37 namespace v8 { |
37 namespace base { | 38 namespace base { |
38 | 39 |
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147 | 148 |
148 // Opens a temporary file, the file is auto removed on close. | 149 // Opens a temporary file, the file is auto removed on close. |
149 static FILE* OpenTemporaryFile(); | 150 static FILE* OpenTemporaryFile(); |
150 | 151 |
151 // Log file open mode is platform-dependent due to line ends issues. | 152 // Log file open mode is platform-dependent due to line ends issues. |
152 static const char* const LogFileOpenMode; | 153 static const char* const LogFileOpenMode; |
153 | 154 |
154 // Print output to console. This is mostly used for debugging output. | 155 // Print output to console. This is mostly used for debugging output. |
155 // On platforms that has standard terminal output, the output | 156 // On platforms that has standard terminal output, the output |
156 // should go to stdout. | 157 // should go to stdout. |
157 static void Print(const char* format, ...); | 158 static PRINTF_FORMAT(1, 2) void Print(const char* format, ...); |
158 static void VPrint(const char* format, va_list args); | 159 static PRINTF_FORMAT(1, 0) void VPrint(const char* format, va_list args); |
159 | 160 |
160 // Print output to a file. This is mostly used for debugging output. | 161 // Print output to a file. This is mostly used for debugging output. |
161 static void FPrint(FILE* out, const char* format, ...); | 162 static PRINTF_FORMAT(2, 3) void FPrint(FILE* out, const char* format, ...); |
162 static void VFPrint(FILE* out, const char* format, va_list args); | 163 static PRINTF_FORMAT(2, 0) void VFPrint(FILE* out, const char* format, |
| 164 va_list args); |
163 | 165 |
164 // Print error output to console. This is mostly used for error message | 166 // Print error output to console. This is mostly used for error message |
165 // output. On platforms that has standard terminal output, the output | 167 // output. On platforms that has standard terminal output, the output |
166 // should go to stderr. | 168 // should go to stderr. |
167 static void PrintError(const char* format, ...); | 169 static PRINTF_FORMAT(1, 2) void PrintError(const char* format, ...); |
168 static void VPrintError(const char* format, va_list args); | 170 static PRINTF_FORMAT(1, 0) void VPrintError(const char* format, va_list args); |
169 | 171 |
170 // Allocate/Free memory used by JS heap. Pages are readable/writable, but | 172 // Allocate/Free memory used by JS heap. Pages are readable/writable, but |
171 // they are not guaranteed to be executable unless 'executable' is true. | 173 // they are not guaranteed to be executable unless 'executable' is true. |
172 // Returns the address of allocated memory, or NULL if failed. | 174 // Returns the address of allocated memory, or NULL if failed. |
173 static void* Allocate(const size_t requested, | 175 static void* Allocate(const size_t requested, |
174 size_t* allocated, | 176 size_t* allocated, |
175 bool is_executable); | 177 bool is_executable); |
176 static void Free(void* address, const size_t size); | 178 static void Free(void* address, const size_t size); |
177 | 179 |
178 // This is the granularity at which the ProtectCode(...) call can set page | 180 // This is the granularity at which the ProtectCode(...) call can set page |
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215 virtual void* memory() const = 0; | 217 virtual void* memory() const = 0; |
216 virtual size_t size() const = 0; | 218 virtual size_t size() const = 0; |
217 | 219 |
218 static MemoryMappedFile* open(const char* name); | 220 static MemoryMappedFile* open(const char* name); |
219 static MemoryMappedFile* create(const char* name, size_t size, | 221 static MemoryMappedFile* create(const char* name, size_t size, |
220 void* initial); | 222 void* initial); |
221 }; | 223 }; |
222 | 224 |
223 // Safe formatting print. Ensures that str is always null-terminated. | 225 // Safe formatting print. Ensures that str is always null-terminated. |
224 // Returns the number of chars written, or -1 if output was truncated. | 226 // Returns the number of chars written, or -1 if output was truncated. |
225 static int SNPrintF(char* str, int length, const char* format, ...); | 227 static PRINTF_FORMAT(3, 4) int SNPrintF(char* str, int length, |
226 static int VSNPrintF(char* str, | 228 const char* format, ...); |
227 int length, | 229 static PRINTF_FORMAT(3, 0) int VSNPrintF(char* str, int length, |
228 const char* format, | 230 const char* format, va_list args); |
229 va_list args); | |
230 | 231 |
231 static char* StrChr(char* str, int c); | 232 static char* StrChr(char* str, int c); |
232 static void StrNCpy(char* dest, int length, const char* src, size_t n); | 233 static void StrNCpy(char* dest, int length, const char* src, size_t n); |
233 | 234 |
234 // Support for the profiler. Can do nothing, in which case ticks | 235 // Support for the profiler. Can do nothing, in which case ticks |
235 // occuring in shared libraries will not be properly accounted for. | 236 // occuring in shared libraries will not be properly accounted for. |
236 struct SharedLibraryAddress { | 237 struct SharedLibraryAddress { |
237 SharedLibraryAddress( | 238 SharedLibraryAddress( |
238 const std::string& library_path, uintptr_t start, uintptr_t end) | 239 const std::string& library_path, uintptr_t start, uintptr_t end) |
239 : library_path(library_path), start(start), end(end) {} | 240 : library_path(library_path), start(start), end(end) {} |
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481 int stack_size_; | 482 int stack_size_; |
482 Semaphore* start_semaphore_; | 483 Semaphore* start_semaphore_; |
483 | 484 |
484 DISALLOW_COPY_AND_ASSIGN(Thread); | 485 DISALLOW_COPY_AND_ASSIGN(Thread); |
485 }; | 486 }; |
486 | 487 |
487 } // namespace base | 488 } // namespace base |
488 } // namespace v8 | 489 } // namespace v8 |
489 | 490 |
490 #endif // V8_BASE_PLATFORM_PLATFORM_H_ | 491 #endif // V8_BASE_PLATFORM_PLATFORM_H_ |
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