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| 1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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| 102 // ---------------------------------------------------------------------------- | 102 // ---------------------------------------------------------------------------- |
| 103 // OS | 103 // OS |
| 104 // | 104 // |
| 105 // This class has static methods for the different platform specific | 105 // This class has static methods for the different platform specific |
| 106 // functions. Add methods here to cope with differences between the | 106 // functions. Add methods here to cope with differences between the |
| 107 // supported platforms. | 107 // supported platforms. |
| 108 | 108 |
| 109 class OS { | 109 class OS { |
| 110 public: | 110 public: |
| 111 // Initializes the platform OS support. Called once at VM startup. | 111 // Initializes the platform OS support. Called once at VM startup. |
| 112 static void Setup(); | 112 static void SetUp(); |
| 113 | 113 |
| 114 // Returns the accumulated user time for thread. This routine | 114 // Returns the accumulated user time for thread. This routine |
| 115 // can be used for profiling. The implementation should | 115 // can be used for profiling. The implementation should |
| 116 // strive for high-precision timer resolution, preferable | 116 // strive for high-precision timer resolution, preferable |
| 117 // micro-second resolution. | 117 // micro-second resolution. |
| 118 static int GetUserTime(uint32_t* secs, uint32_t* usecs); | 118 static int GetUserTime(uint32_t* secs, uint32_t* usecs); |
| 119 | 119 |
| 120 // Get a tick counter normalized to one tick per microsecond. | 120 // Get a tick counter normalized to one tick per microsecond. |
| 121 // Used for calculating time intervals. | 121 // Used for calculating time intervals. |
| 122 static int64_t Ticks(); | 122 static int64_t Ticks(); |
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| 470 | 470 |
| 471 | 471 |
| 472 // The thread name length is limited to 16 based on Linux's implementation of | 472 // The thread name length is limited to 16 based on Linux's implementation of |
| 473 // prctl(). | 473 // prctl(). |
| 474 static const int kMaxThreadNameLength = 16; | 474 static const int kMaxThreadNameLength = 16; |
| 475 | 475 |
| 476 class PlatformData; | 476 class PlatformData; |
| 477 PlatformData* data() { return data_; } | 477 PlatformData* data() { return data_; } |
| 478 | 478 |
| 479 private: | 479 private: |
| 480 void set_name(const char *name); | 480 void set_name(const char* name); |
| 481 | 481 |
| 482 PlatformData* data_; | 482 PlatformData* data_; |
| 483 | 483 |
| 484 char name_[kMaxThreadNameLength]; | 484 char name_[kMaxThreadNameLength]; |
| 485 int stack_size_; | 485 int stack_size_; |
| 486 | 486 |
| 487 DISALLOW_COPY_AND_ASSIGN(Thread); | 487 DISALLOW_COPY_AND_ASSIGN(Thread); |
| 488 }; | 488 }; |
| 489 | 489 |
| 490 | 490 |
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| 546 | 546 |
| 547 class Semaphore { | 547 class Semaphore { |
| 548 public: | 548 public: |
| 549 virtual ~Semaphore() {} | 549 virtual ~Semaphore() {} |
| 550 | 550 |
| 551 // Suspends the calling thread until the semaphore counter is non zero | 551 // Suspends the calling thread until the semaphore counter is non zero |
| 552 // and then decrements the semaphore counter. | 552 // and then decrements the semaphore counter. |
| 553 virtual void Wait() = 0; | 553 virtual void Wait() = 0; |
| 554 | 554 |
| 555 // Suspends the calling thread until the counter is non zero or the timeout | 555 // Suspends the calling thread until the counter is non zero or the timeout |
| 556 // time has passsed. If timeout happens the return value is false and the | 556 // time has passed. If timeout happens the return value is false and the |
| 557 // counter is unchanged. Otherwise the semaphore counter is decremented and | 557 // counter is unchanged. Otherwise the semaphore counter is decremented and |
| 558 // true is returned. The timeout value is specified in microseconds. | 558 // true is returned. The timeout value is specified in microseconds. |
| 559 virtual bool Wait(int timeout) = 0; | 559 virtual bool Wait(int timeout) = 0; |
| 560 | 560 |
| 561 // Increments the semaphore counter. | 561 // Increments the semaphore counter. |
| 562 virtual void Signal() = 0; | 562 virtual void Signal() = 0; |
| 563 }; | 563 }; |
| 564 | 564 |
| 565 | 565 |
| 566 // ---------------------------------------------------------------------------- | 566 // ---------------------------------------------------------------------------- |
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| 586 | 586 |
| 587 // Data Transimission | 587 // Data Transimission |
| 588 virtual int Send(const char* data, int len) const = 0; | 588 virtual int Send(const char* data, int len) const = 0; |
| 589 virtual int Receive(char* data, int len) const = 0; | 589 virtual int Receive(char* data, int len) const = 0; |
| 590 | 590 |
| 591 // Set the value of the SO_REUSEADDR socket option. | 591 // Set the value of the SO_REUSEADDR socket option. |
| 592 virtual bool SetReuseAddress(bool reuse_address) = 0; | 592 virtual bool SetReuseAddress(bool reuse_address) = 0; |
| 593 | 593 |
| 594 virtual bool IsValid() const = 0; | 594 virtual bool IsValid() const = 0; |
| 595 | 595 |
| 596 static bool Setup(); | 596 static bool SetUp(); |
| 597 static int LastError(); | 597 static int LastError(); |
| 598 static uint16_t HToN(uint16_t value); | 598 static uint16_t HToN(uint16_t value); |
| 599 static uint16_t NToH(uint16_t value); | 599 static uint16_t NToH(uint16_t value); |
| 600 static uint32_t HToN(uint32_t value); | 600 static uint32_t HToN(uint32_t value); |
| 601 static uint32_t NToH(uint32_t value); | 601 static uint32_t NToH(uint32_t value); |
| 602 }; | 602 }; |
| 603 | 603 |
| 604 | 604 |
| 605 // ---------------------------------------------------------------------------- | 605 // ---------------------------------------------------------------------------- |
| 606 // Sampler | 606 // Sampler |
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| 688 Atomic32 active_; | 688 Atomic32 active_; |
| 689 PlatformData* data_; // Platform specific data. | 689 PlatformData* data_; // Platform specific data. |
| 690 int samples_taken_; // Counts stack samples taken. | 690 int samples_taken_; // Counts stack samples taken. |
| 691 DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler); | 691 DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler); |
| 692 }; | 692 }; |
| 693 | 693 |
| 694 | 694 |
| 695 } } // namespace v8::internal | 695 } } // namespace v8::internal |
| 696 | 696 |
| 697 #endif // V8_PLATFORM_H_ | 697 #endif // V8_PLATFORM_H_ |
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