| … | |
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| 99 | * This is the type for the initialization function of a new coroutine. |
99 | * This is the type for the initialization function of a new coroutine. |
| 100 | */ |
100 | */ |
| 101 | typedef void (*coro_func)(void *); |
101 | typedef void (*coro_func)(void *); |
| 102 | |
102 | |
| 103 | /* |
103 | /* |
| 104 | * A coroutine state is saved in the following structure. Treat it as a |
104 | * A coroutine state is saved in the following structure. Treat it as an |
| 105 | * opaque type. errno and sigmask might be saved, but don't rely on it, |
105 | * opaque type. errno and sigmask might be saved, but don't rely on it, |
| 106 | * implement your own switching primitive if you need it. |
106 | * implement your own switching primitive if you need that. |
| 107 | */ |
107 | */ |
| 108 | typedef struct coro_context coro_context; |
108 | typedef struct coro_context coro_context; |
| 109 | |
109 | |
| 110 | /* |
110 | /* |
| 111 | * This function creates a new coroutine. Apart from a pointer to an |
111 | * This function creates a new coroutine. Apart from a pointer to an |
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| 113 | * and the single pointer value that is given to it as argument. |
113 | * and the single pointer value that is given to it as argument. |
| 114 | * |
114 | * |
| 115 | * Allocating/deallocating the stack is your own responsibility, so there is |
115 | * Allocating/deallocating the stack is your own responsibility, so there is |
| 116 | * no coro_destroy function. |
116 | * no coro_destroy function. |
| 117 | */ |
117 | */ |
| 118 | void coro_create (coro_context *ctx, |
118 | void coro_create (coro_context *ctx, /* an uninitialised coro_context */ |
| 119 | coro_func coro, void *arg, |
119 | coro_func coro, /* the coroutine code to be executed */ |
| 120 | void *sptr, long ssize); |
120 | void *arg, /* a single pointer passed to the coro */ |
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121 | void *sptr, /* start of stack area */ |
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122 | long ssize); /* size of stack area */ |
| 121 | |
123 | |
| 122 | /* |
124 | /* |
| 123 | * The following prototype defines the coroutine switching function. It is |
125 | * The following prototype defines the coroutine switching function. It is |
| 124 | * usually implemented as a macro, so watch out. |
126 | * usually implemented as a macro, so watch out. |
| 125 | * |
127 | * |
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| 160 | #define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc)) |
162 | #define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc)) |
| 161 | |
163 | |
| 162 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX |
164 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX |
| 163 | |
165 | |
| 164 | #if defined(CORO_LINUX) && !defined(_GNU_SOURCE) |
166 | #if defined(CORO_LINUX) && !defined(_GNU_SOURCE) |
| 165 | # define _GNU_SOURCE // for linux libc |
167 | # define _GNU_SOURCE /* for linux libc */ |
| 166 | #endif |
168 | #endif |
| 167 | |
169 | |
| 168 | #include <setjmp.h> |
170 | #include <setjmp.h> |
| 169 | |
171 | |
| 170 | struct coro_context { |
172 | struct coro_context { |
| 171 | jmp_buf env; |
173 | jmp_buf env; |
| 172 | }; |
174 | }; |
| 173 | |
175 | |
| 174 | #if CORO_LINUX |
176 | #if CORO_LINUX |
| 175 | # define coro_transfer(p,n) do { if (!_setjmp ((p)->env)) _longjmp ((n)->env, 1); } while(0) |
177 | # define coro_transfer(p,n) do { if (!_setjmp ((p)->env)) _longjmp ((n)->env, 1); } while (0) |
| 176 | #else |
178 | #else |
| 177 | # define coro_transfer(p,n) do { if (!setjmp ((p)->env)) longjmp ((n)->env, 1); } while(0) |
179 | # define coro_transfer(p,n) do { if (!setjmp ((p)->env)) longjmp ((n)->env, 1); } while (0) |
| 178 | #endif |
180 | #endif |
| 179 | |
181 | |
| 180 | #endif |
182 | #endif |
| 181 | |
183 | |
| 182 | #endif |
184 | #endif |
