Retro68/gcc/libcilkrts/runtime/cilk_fiber-unix.h

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/* cilk_fiber-unix.h -*-C++-*-
*
*************************************************************************
*
* @copyright
* Copyright (C) 2012-2013, Intel Corporation
* All rights reserved.
*
* @copyright
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* @copyright
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
**************************************************************************/
#ifndef INCLUDED_CILK_FIBER_UNIX_DOT_H
#define INCLUDED_CILK_FIBER_UNIX_DOT_H
#ifndef __cplusplus
# error cilk_fiber-unix.h is a C++-only header
#endif
#include "cilk_fiber.h"
#include "jmpbuf.h"
/**
* @file cilk_fiber-unix.h
*
* @brief Unix-specific implementation for cilk_fiber.
*/
/**
* @brief Unix-specific fiber class derived from portable fiber class
*/
struct cilk_fiber_sysdep : public cilk_fiber
{
public:
#if SUPPORT_GET_CURRENT_FIBER
/**
* @brief Gets the current fiber from TLS.
*/
static cilk_fiber_sysdep* get_current_fiber_sysdep();
#endif
/**
* @brief Construct the system-dependent portion of a fiber.
*
* @param stack_size The size of the stack for this fiber.
*/
cilk_fiber_sysdep(std::size_t stack_size);
/**
* @brief Construct the system-dependent of a fiber created from a
* thread.
*/
cilk_fiber_sysdep(from_thread_t);
/**
* @brief Destructor
*/
~cilk_fiber_sysdep();
/**
* @brief OS-specific calls to convert this fiber back to thread.
*
* Nothing to do for Linux.
*/
void convert_fiber_back_to_thread();
/**
* @brief System-dependent function to suspend self and resume execution of "other".
*
* This fiber is suspended.
*
* @pre @c is_resumable() should be true.
*
* @param other Fiber to resume.
*/
void suspend_self_and_resume_other_sysdep(cilk_fiber_sysdep* other);
/**
* @brief System-dependent function called to jump to @p other
* fiber.
*
* @pre @c is_resumable() should be false.
*
* @param other Fiber to resume.
*/
NORETURN jump_to_resume_other_sysdep(cilk_fiber_sysdep* other);
/**
* @brief Runs the start_proc.
* @pre is_resumable() should be false.
* @pre is_allocated_from_thread() should be false.
* @pre m_start_proc must be valid.
*/
NORETURN run();
/**
* @brief Returns the base of this fiber's stack.
*/
inline char* get_stack_base_sysdep() { return m_stack_base; }
private:
char* m_stack_base; ///< The base of this fiber's stack.
char* m_stack; // Stack memory (low address)
__CILK_JUMP_BUFFER m_resume_jmpbuf; // Place to resume fiber
unsigned m_magic; // Magic number for checking
static int s_page_size; // Page size for
// stacks.
// Allocate memory for a stack. This method
// initializes m_stack and m_stack_base.
void make_stack(size_t stack_size);
// Deallocates memory for the stack.
void free_stack();
// Common helper method for implementation of resume_other_sysdep
// variants.
inline void resume_other_sysdep(cilk_fiber_sysdep* other);
};
#endif // ! defined(INCLUDED_CILK_FIBER_UNIX_DOT_H)