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74 | # include <stdio.h> |
74 | # include <stdio.h> |
75 | # include <signal.h> |
75 | # include <signal.h> |
76 | # include <unistd.h> |
76 | # include <unistd.h> |
77 | # endif |
77 | # endif |
78 | |
78 | |
79 | static volatile coro_func coro_init_func; |
79 | static coro_func coro_init_func; |
80 | static volatile void *coro_init_arg; |
80 | static void *coro_init_arg; |
81 | static volatile coro_context *new_coro, *create_coro; |
81 | static coro_context *new_coro, *create_coro; |
82 | |
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83 | /* what we really want to detect here is wether we use a new-enough version of GAS */ |
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84 | /* with dwarf debug info. instead, check for gcc 3, ELF and GNU/Linux and hope for the best */ |
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85 | # if __GNUC__ >= 3 && __ELF__ && __linux__ |
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86 | # define HAVE_CFI 1 |
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87 | # endif |
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88 | |
82 | |
89 | static void |
83 | static void |
90 | coro_init (void) |
84 | coro_init (void) |
91 | { |
85 | { |
92 | volatile coro_func func = coro_init_func; |
86 | volatile coro_func func = coro_init_func; |
93 | volatile void *arg = coro_init_arg; |
87 | volatile void *arg = coro_init_arg; |
94 | |
88 | |
95 | coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); |
89 | coro_transfer (new_coro, create_coro); |
96 | |
90 | |
97 | func ((void *)arg); |
91 | func ((void *)arg); |
98 | |
92 | |
99 | /* the new coro returned. bad. just abort() for now */ |
93 | /* the new coro returned. bad. just abort() for now */ |
100 | abort (); |
94 | abort (); |
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110 | { |
104 | { |
111 | if ( |
105 | if ( |
112 | #if _XOPEN_UNIX > 0 |
106 | #if _XOPEN_UNIX > 0 |
113 | _setjmp (new_coro->env) |
107 | _setjmp (new_coro->env) |
114 | #else |
108 | #else |
115 | setjmp (new_coro->env) |
109 | sigsetjmp (new_coro->env, 0) |
116 | #endif |
110 | #endif |
117 | ) { |
111 | ) { |
118 | #if HAVE_CFI |
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119 | asm (".cfi_startproc"); |
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120 | #endif |
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121 | coro_init (); /* start it */ |
112 | coro_init (); /* start it */ |
122 | #if HAVE_CFI |
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123 | asm (".cfi_endproc"); |
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124 | #endif |
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125 | } |
113 | } |
126 | else |
114 | else |
127 | trampoline_done = 1; |
115 | trampoline_done = 1; |
128 | } |
116 | } |
129 | |
117 | |
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279 | #error "linux libc or architecture not supported" |
267 | #error "linux libc or architecture not supported" |
280 | #endif |
268 | #endif |
281 | |
269 | |
282 | # elif CORO_IRIX |
270 | # elif CORO_IRIX |
283 | |
271 | |
284 | setjmp (ctx->env); |
272 | sigsetjmp (ctx->env, 0); |
285 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
273 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
286 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
274 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
287 | |
275 | |
288 | # elif CORO_ASM |
276 | # elif CORO_ASM |
289 | |
277 | |
290 | ctx->sp = (volatile void **)(ssize + (char *)sptr); |
278 | ctx->sp = (void **)(ssize + (char *)sptr); |
291 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
279 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
292 | *--ctx->sp = (void *)coro_init; |
280 | *--ctx->sp = (void *)coro_init; |
293 | ctx->sp -= NUM_SAVED; |
281 | ctx->sp -= NUM_SAVED; |
294 | |
282 | |
295 | # elif CORO_UCONTEXT |
283 | # elif CORO_UCONTEXT |
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306 | # endif |
294 | # endif |
307 | |
295 | |
308 | coro_transfer (create_coro, new_coro); |
296 | coro_transfer (create_coro, new_coro); |
309 | } |
297 | } |
310 | |
298 | |
311 | #endif |
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312 | |
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313 | /*****************************************************************************/ |
299 | /*****************************************************************************/ |
314 | /* pthread backend */ |
300 | /* pthread backend */ |
315 | /*****************************************************************************/ |
301 | /*****************************************************************************/ |
316 | |
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317 | #if CORO_PTHREAD |
302 | #elif CORO_PTHREAD |
318 | |
303 | |
319 | /* this mutex will be locked by the running coroutine */ |
304 | /* this mutex will be locked by the running coroutine */ |
320 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
305 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
321 | |
306 | |
322 | struct coro_init_args |
307 | struct coro_init_args |
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356 | void |
341 | void |
357 | coro_transfer (coro_context *prev, coro_context *next) |
342 | coro_transfer (coro_context *prev, coro_context *next) |
358 | { |
343 | { |
359 | pthread_cond_signal (&next->cv); |
344 | pthread_cond_signal (&next->cv); |
360 | pthread_cond_wait (&prev->cv, &coro_mutex); |
345 | pthread_cond_wait (&prev->cv, &coro_mutex); |
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346 | #if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */ |
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347 | pthread_testcancel (); |
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348 | #endif |
361 | } |
349 | } |
362 | |
350 | |
363 | void |
351 | void |
364 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
352 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
365 | { |
353 | { |
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410 | } |
398 | } |
411 | |
399 | |
412 | pthread_cond_destroy (&ctx->cv); |
400 | pthread_cond_destroy (&ctx->cv); |
413 | } |
401 | } |
414 | |
402 | |
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403 | #else |
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404 | # error unsupported backend |
415 | #endif |
405 | #endif |
416 | |
406 | |