1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* Copyright (c) 2001 Marc Alexander Lehmann <pcg@goof.com>
*
* Redistribution and use in source and binary forms, with or without modifica-
* tion, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
* CIAL, 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 OTH-
* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This library is modelled strictly after Ralf S. Engelschalls article at
* http://www.gnu.org/software/pth/rse-pmt.ps. So most of the credit must
* go to Ralf S. Engelschall <rse@engelschall.com>.
*
* This coroutine library is very much stripped down. You should either
* build your own process avstraction using it or - better - just use GNU
* Portable Threads, http://www.gnu.org/software/pth/.
*/
#ifndef CORO_H
#define CORO_H
typedef void (*coro_func)(void *);
#if defined(WINDOWS)
# define CORO_LOOSE 1 /* you don't win with windoze */
#elif defined(HAVE_UCONTEXT_H)
# define CORO_UCONTEXT 1
#elif defined(HAVE_SETJMP_H) && defined(HAVE_SIGALTSTACK)
# define CORO_SJLJ 1
#else
error unknown or unsupported architecture
#endif
#if CORO_UCONTEXT
#include <ucontext.h>
typedef struct {
ucontext_t uc;
} coro_context;
#define coro_transfer(p,n) swapcontext(&((p)->uc), &((n)->uc))
#elif CORO_SJLJ || CORO_LOOSE
#include <setjmp.h>
typedef struct {
jmp_buf env;
} coro_context;
#define coro_transfer(p,n) if (!setjmp ((p)->env)) longjmp ((n)->env, 1)
#endif
void coro_create(coro_context *ctx,
coro_func coro, void *arg,
void *sptr, long ssize);
#endif
|
