1 | /* |
1 | /* |
2 | * Copyright (c) 2001 Marc Alexander Lehmann <pcg@goof.com> |
2 | * Copyright (c) 2001-2005 Marc Alexander Lehmann <schmorp@schmorp.de> |
3 | * |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without modifica- |
4 | * Redistribution and use in source and binary forms, with or without modifica- |
5 | * tion, are permitted provided that the following conditions are met: |
5 | * tion, are permitted provided that the following conditions are met: |
6 | * |
6 | * |
7 | * 1. Redistributions of source code must retain the above copyright notice, |
7 | * 1. Redistributions of source code must retain the above copyright notice, |
… | |
… | |
28 | * This library is modelled strictly after Ralf S. Engelschalls article at |
28 | * This library is modelled strictly after Ralf S. Engelschalls article at |
29 | * http://www.gnu.org/software/pth/rse-pmt.ps. So most of the credit must |
29 | * http://www.gnu.org/software/pth/rse-pmt.ps. So most of the credit must |
30 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
30 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
31 | * |
31 | * |
32 | * This coroutine library is very much stripped down. You should either |
32 | * This coroutine library is very much stripped down. You should either |
33 | * build your own process avstraction using it or - better - just use GNU |
33 | * build your own process abstraction using it or - better - just use GNU |
34 | * Portable Threads, http://www.gnu.org/software/pth/. |
34 | * Portable Threads, http://www.gnu.org/software/pth/. |
35 | * |
35 | * |
36 | * VERSION: 0.1 |
|
|
37 | */ |
36 | */ |
38 | |
37 | |
39 | #ifndef CORO_H |
38 | #ifndef CORO_H |
40 | #define CORO_H |
39 | #define CORO_H |
41 | |
40 | |
|
|
41 | #define CORO_VERSION 1 |
|
|
42 | |
42 | /* |
43 | /* |
43 | * This library consists of only three files |
44 | * This library consists of only three files |
44 | * coro.h, coro.c and LICENSE |
45 | * coro.h, coro.c and LICENSE (and optionally README) |
45 | * |
46 | * |
46 | * It implements what is known as coroutines, in a hopefully |
47 | * It implements what is known as coroutines, in a hopefully |
47 | * portable way. At the moment you have to define which kind |
48 | * portable way. At the moment you have to define which kind |
48 | * of implementation flavour you want: |
49 | * of implementation flavour you want: |
49 | * |
50 | * |
… | |
… | |
101 | * and the single pointer value that is given to it as argument. |
102 | * and the single pointer value that is given to it as argument. |
102 | * |
103 | * |
103 | * Allocating/deallocating the stack is your own responsibility, so there is |
104 | * Allocating/deallocating the stack is your own responsibility, so there is |
104 | * no coro_destroy function. |
105 | * no coro_destroy function. |
105 | */ |
106 | */ |
106 | void coro_create(coro_context *ctx, |
107 | void coro_create (coro_context *ctx, |
107 | coro_func coro, void *arg, |
108 | coro_func coro, void *arg, |
108 | void *sptr, long ssize); |
109 | void *sptr, long ssize); |
109 | |
110 | |
110 | /* |
111 | /* |
111 | * The following prototype defines the coroutine switching function. It is |
112 | * The following prototype defines the coroutine switching function. It is |
112 | * usually implemented as a macro, so watch out. |
113 | * usually implemented as a macro, so watch out. |
113 | * |
114 | * |
… | |
… | |
143 | |
144 | |
144 | struct coro_context { |
145 | struct coro_context { |
145 | ucontext_t uc; |
146 | ucontext_t uc; |
146 | }; |
147 | }; |
147 | |
148 | |
148 | #define coro_transfer(p,n) swapcontext(&((p)->uc), &((n)->uc)) |
149 | #define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc)) |
149 | |
150 | |
150 | #elif CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX |
151 | #elif CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX |
|
|
152 | |
|
|
153 | #if defined(CORO_LINUX) && !defined(_GNU_SOURCE) |
|
|
154 | # define _GNU_SOURCE // for linux libc |
|
|
155 | #endif |
151 | |
156 | |
152 | #include <setjmp.h> |
157 | #include <setjmp.h> |
153 | |
158 | |
154 | struct coro_context { |
159 | struct coro_context { |
155 | jmp_buf env; |
160 | jmp_buf env; |
156 | }; |
161 | }; |
157 | |
162 | |
158 | #define coro_transfer(p,n) if (!setjmp ((p)->env)) longjmp ((n)->env, 1) |
163 | #define coro_transfer(p,n) do { if (!setjmp ((p)->env)) longjmp ((n)->env, 1); } while(0) |
159 | |
164 | |
160 | #endif |
165 | #endif |
161 | |
166 | |
162 | #endif |
167 | #endif |
163 | |
168 | |