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/* |
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* Copyright (c) 2001 Marc Alexander Lehmann <pcg@goof.com> |
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* |
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* Redistribution and use in source and binary forms, with or without modifica- |
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* tion, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright notice, |
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* this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
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* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
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* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
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* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* This library is modelled strictly after Ralf S. Engelschalls article at |
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* http://www.gnu.org/software/pth/rse-pmt.ps. So most of the credit must |
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* go to Ralf S. Engelschall <rse@engelschall.com>. |
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* |
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* This coroutine library is very much stripped down. You should either |
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* build your own process avstraction using it or - better - just use GNU |
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* Portable Threads, http://www.gnu.org/software/pth/. |
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*/ |
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#ifndef CORO_H |
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#define CORO_H |
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typedef void (*coro_func)(void *); |
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#if defined(WINDOWS) |
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# define CORO_LOOSE 1 /* you don't win with windoze */ |
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#elif defined(HAVE_UCONTEXT_H) |
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# define CORO_UCONTEXT 1 |
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#elif defined(HAVE_SETJMP_H) && defined(HAVE_SIGALTSTACK) |
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# define CORO_SJLJ 1 |
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#else |
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error unknown or unsupported architecture |
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#endif |
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#if CORO_UCONTEXT |
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#include <ucontext.h> |
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typedef struct { |
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ucontext_t uc; |
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} coro_context; |
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#define coro_transfer(p,n) swapcontext(&((p)->uc), &((n)->uc)) |
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#elif CORO_SJLJ || CORO_LOOSE |
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#include <setjmp.h> |
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typedef struct { |
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jmp_buf env; |
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} coro_context; |
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#define coro_transfer(p,n) if (!setjmp ((p)->env)) longjmp ((n)->env, 1) |
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#endif |
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void coro_create(coro_context *ctx, |
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coro_func coro, void *arg, |
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void *sptr, long ssize); |
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#endif |
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