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106 lines
3.7 KiB
C
106 lines
3.7 KiB
C
/* os-unix-sysdep.c -*-C-*-
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*
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*************************************************************************
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*
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* Copyright (C) 2009-2016, Intel Corporation
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* All rights reserved.
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*
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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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* 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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* *********************************************************************
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*
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* PLEASE NOTE: This file is a downstream copy of a file mainitained in
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* a repository at cilkplus.org. Changes made to this file that are not
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* submitted through the contribution process detailed at
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* http://www.cilkplus.org/submit-cilk-contribution will be lost the next
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* time that a new version is released. Changes only submitted to the
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* GNU compiler collection or posted to the git repository at
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* https://bitbucket.org/intelcilkruntime/intel-cilk-runtime.git are
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* not tracked.
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*
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* We welcome your contributions to this open source project. Thank you
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* for your assistance in helping us improve Cilk Plus.
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*************************************************************************
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*
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* This file contains generic implementations of system-specific code for
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* Unix-based systems
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*/
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#include "os.h"
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#include "sysdep.h"
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/*
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* The cycle counter is used for debugging. This funciton is only called if
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* CILK_PROFILE is defined when the runtime is built.
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*/
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COMMON_SYSDEP unsigned long long __cilkrts_getticks(void)
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{
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# warning "unimplemented cycle counter"
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return 0;
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}
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/*
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* A "short pause" - called from the Cilk runtime's spinloops.
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*/
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COMMON_SYSDEP void __cilkrts_short_pause(void)
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{
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# warning __cilkrts_short_pause empty
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}
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/*
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* Interlocked exchange - used to implement the Cilk runtime's spinloops
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*/
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COMMON_SYSDEP int __cilkrts_xchg(volatile int *ptr, int x)
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{
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x = __sync_lock_test_and_set(ptr, x);
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return x;
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}
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/*
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* Restore the floating point state that is stored in a stack frame at each
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* spawn. This should be called each time a frame is resumed.
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*
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* Only valid for IA32 and Intel64 processors.
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*/
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void restore_x86_fp_state (__cilkrts_stack_frame *sf)
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{
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}
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/*
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* Save the floating point state to the __cilkrts_stack_frame at each spawn.
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*
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* Architecture-specific - Should only be needed on IA32 and Intel64
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* processors.
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*/
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void sysdep_save_fp_ctrl_state(__cilkrts_stack_frame *sf)
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{
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}
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