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