… | |
… | |
38 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
38 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
39 | */ |
39 | */ |
40 | |
40 | |
41 | #include "coro.h" |
41 | #include "coro.h" |
42 | |
42 | |
|
|
43 | #include <string.h> |
|
|
44 | |
|
|
45 | /*****************************************************************************/ |
|
|
46 | /* ucontext/setjmp/asm backends */ |
|
|
47 | /*****************************************************************************/ |
|
|
48 | #if CORO_UCONTEXT || CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
|
|
49 | |
|
|
50 | # if CORO_UCONTEXT |
|
|
51 | # include <stddef.h> |
|
|
52 | # endif |
|
|
53 | |
43 | #if !defined(STACK_ADJUST_PTR) |
54 | # if !defined(STACK_ADJUST_PTR) |
|
|
55 | # if __sgi |
44 | /* IRIX is decidedly NON-unix */ |
56 | /* IRIX is decidedly NON-unix */ |
45 | # if __sgi |
|
|
46 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
57 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
47 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
58 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
48 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
59 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
49 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
60 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
50 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
61 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
51 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
62 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
52 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
63 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
53 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
64 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
54 | # else |
65 | # else |
55 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
66 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
56 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
67 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
57 | # endif |
68 | # endif |
58 | #endif |
69 | # endif |
59 | |
70 | |
60 | #if CORO_UCONTEXT |
|
|
61 | # include <stddef.h> |
|
|
62 | #endif |
|
|
63 | |
|
|
64 | #if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
|
|
65 | |
|
|
66 | #include <stdlib.h> |
71 | # include <stdlib.h> |
67 | |
72 | |
68 | #if CORO_SJLJ |
73 | # if CORO_SJLJ |
69 | # include <stdio.h> |
74 | # include <stdio.h> |
70 | # include <signal.h> |
75 | # include <signal.h> |
71 | # include <unistd.h> |
76 | # include <unistd.h> |
72 | #endif |
77 | # endif |
73 | |
78 | |
74 | static volatile coro_func coro_init_func; |
79 | static coro_func coro_init_func; |
75 | static volatile void *coro_init_arg; |
80 | static void *coro_init_arg; |
76 | static volatile coro_context *new_coro, *create_coro; |
81 | static coro_context *new_coro, *create_coro; |
77 | |
82 | |
78 | /* what we really want to detect here is wether we use a new-enough version of GAS */ |
83 | /* what we really want to detect here is wether we use a new-enough version of GAS */ |
79 | /* instead, check for gcc 3, ELF and GNU/Linux and hope for the best */ |
84 | /* with dwarf debug info. instead, check for gcc 3, ELF and GNU/Linux and hope for the best */ |
80 | #if __GNUC__ >= 3 && __ELF__ && __linux__ |
85 | # if __GNUC__ >= 3 && __ELF__ && __linux__ |
81 | # define HAVE_CFI 1 |
86 | # define HAVE_CFI 1 |
82 | #endif |
87 | # endif |
83 | |
88 | |
84 | static void |
89 | static void |
85 | coro_init (void) |
90 | coro_init (void) |
86 | { |
91 | { |
87 | volatile coro_func func = coro_init_func; |
92 | volatile coro_func func = coro_init_func; |
88 | volatile void *arg = coro_init_arg; |
93 | volatile void *arg = coro_init_arg; |
89 | |
94 | |
90 | coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); |
95 | coro_transfer (new_coro, create_coro); |
91 | |
96 | |
92 | func ((void *)arg); |
97 | func ((void *)arg); |
93 | |
98 | |
94 | /* the new coro returned. bad. just abort() for now */ |
99 | /* the new coro returned. bad. just abort() for now */ |
95 | abort (); |
100 | abort (); |
96 | } |
101 | } |
97 | |
102 | |
98 | # if CORO_SJLJ |
103 | # if CORO_SJLJ |
99 | |
104 | |
100 | static volatile int trampoline_count; |
105 | static volatile int trampoline_done; |
101 | |
106 | |
102 | /* trampoline signal handler */ |
107 | /* trampoline signal handler */ |
103 | static void |
108 | static void |
104 | trampoline (int sig) |
109 | trampoline (int sig) |
105 | { |
110 | { |
106 | if (setjmp (((coro_context *)new_coro)->env)) |
111 | if ( |
|
|
112 | #if _XOPEN_UNIX > 0 |
|
|
113 | _setjmp (new_coro->env) |
|
|
114 | #else |
|
|
115 | sigsetjmp (new_coro->env, 0) |
|
|
116 | #endif |
|
|
117 | ) { |
|
|
118 | #if HAVE_CFI |
|
|
119 | asm (".cfi_startproc"); |
|
|
120 | #endif |
|
|
121 | coro_init (); /* start it */ |
|
|
122 | #if HAVE_CFI |
|
|
123 | asm (".cfi_endproc"); |
|
|
124 | #endif |
|
|
125 | } |
|
|
126 | else |
|
|
127 | trampoline_done = 1; |
|
|
128 | } |
|
|
129 | |
|
|
130 | # endif |
|
|
131 | |
|
|
132 | # if CORO_ASM |
|
|
133 | |
|
|
134 | asm ( |
|
|
135 | ".text\n" |
|
|
136 | ".globl coro_transfer\n" |
|
|
137 | ".type coro_transfer, @function\n" |
|
|
138 | "coro_transfer:\n" |
|
|
139 | #if __amd64 |
|
|
140 | #define NUM_SAVED 6 |
|
|
141 | "\tpush %rbp\n" |
|
|
142 | "\tpush %rbx\n" |
|
|
143 | "\tpush %r12\n" |
|
|
144 | "\tpush %r13\n" |
|
|
145 | "\tpush %r14\n" |
|
|
146 | "\tpush %r15\n" |
|
|
147 | "\tmov %rsp, (%rdi)\n" |
|
|
148 | "\tmov (%rsi), %rsp\n" |
|
|
149 | "\tpop %r15\n" |
|
|
150 | "\tpop %r14\n" |
|
|
151 | "\tpop %r13\n" |
|
|
152 | "\tpop %r12\n" |
|
|
153 | "\tpop %rbx\n" |
|
|
154 | "\tpop %rbp\n" |
|
|
155 | #elif __i386 |
|
|
156 | #define NUM_SAVED 4 |
|
|
157 | "\tpush %ebp\n" |
|
|
158 | "\tpush %ebx\n" |
|
|
159 | "\tpush %esi\n" |
|
|
160 | "\tpush %edi\n" |
|
|
161 | "\tmov %esp, (%eax)\n" |
|
|
162 | "\tmov (%edx), %esp\n" |
|
|
163 | "\tpop %edi\n" |
|
|
164 | "\tpop %esi\n" |
|
|
165 | "\tpop %ebx\n" |
|
|
166 | "\tpop %ebp\n" |
|
|
167 | #else |
|
|
168 | #error unsupported architecture |
|
|
169 | #endif |
|
|
170 | "\tret\n" |
|
|
171 | ); |
|
|
172 | |
|
|
173 | # endif |
|
|
174 | |
|
|
175 | void |
|
|
176 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
|
|
177 | { |
|
|
178 | coro_context nctx; |
|
|
179 | # if CORO_SJLJ |
|
|
180 | stack_t ostk, nstk; |
|
|
181 | struct sigaction osa, nsa; |
|
|
182 | sigset_t nsig, osig; |
|
|
183 | # endif |
|
|
184 | |
|
|
185 | if (!coro) |
|
|
186 | return; |
|
|
187 | |
|
|
188 | coro_init_func = coro; |
|
|
189 | coro_init_arg = arg; |
|
|
190 | |
|
|
191 | new_coro = ctx; |
|
|
192 | create_coro = &nctx; |
|
|
193 | |
|
|
194 | # if CORO_SJLJ |
|
|
195 | /* we use SIGUSR2. first block it, then fiddle with it. */ |
|
|
196 | |
|
|
197 | sigemptyset (&nsig); |
|
|
198 | sigaddset (&nsig, SIGUSR2); |
|
|
199 | sigprocmask (SIG_BLOCK, &nsig, &osig); |
|
|
200 | |
|
|
201 | nsa.sa_handler = trampoline; |
|
|
202 | sigemptyset (&nsa.sa_mask); |
|
|
203 | nsa.sa_flags = SA_ONSTACK; |
|
|
204 | |
|
|
205 | if (sigaction (SIGUSR2, &nsa, &osa)) |
107 | { |
206 | { |
108 | #if HAVE_CFI |
207 | perror ("sigaction"); |
109 | asm (".cfi_startproc"); |
208 | abort (); |
110 | #endif |
209 | } |
111 | coro_init (); /* start it */ |
210 | |
112 | #if HAVE_CFI |
211 | /* set the new stack */ |
113 | asm (".cfi_endproc"); |
212 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
114 | #endif |
213 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
|
|
214 | nstk.ss_flags = 0; |
|
|
215 | |
|
|
216 | if (sigaltstack (&nstk, &ostk) < 0) |
115 | } |
217 | { |
|
|
218 | perror ("sigaltstack"); |
|
|
219 | abort (); |
|
|
220 | } |
|
|
221 | |
|
|
222 | trampoline_done = 0; |
|
|
223 | kill (getpid (), SIGUSR2); |
|
|
224 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
|
|
225 | |
|
|
226 | while (!trampoline_done) |
|
|
227 | sigsuspend (&nsig); |
|
|
228 | |
|
|
229 | sigaltstack (0, &nstk); |
|
|
230 | nstk.ss_flags = SS_DISABLE; |
|
|
231 | if (sigaltstack (&nstk, 0) < 0) |
|
|
232 | perror ("sigaltstack"); |
|
|
233 | |
|
|
234 | sigaltstack (0, &nstk); |
|
|
235 | if (~nstk.ss_flags & SS_DISABLE) |
|
|
236 | abort (); |
|
|
237 | |
|
|
238 | if (~ostk.ss_flags & SS_DISABLE) |
|
|
239 | sigaltstack (&ostk, 0); |
|
|
240 | |
|
|
241 | sigaction (SIGUSR2, &osa, 0); |
|
|
242 | sigprocmask (SIG_SETMASK, &osig, 0); |
|
|
243 | |
|
|
244 | # elif CORO_LOSER |
|
|
245 | |
|
|
246 | setjmp (ctx->env); |
|
|
247 | #if __CYGWIN__ |
|
|
248 | ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); |
|
|
249 | ctx->env[8] = (long)coro_init; |
|
|
250 | #elif defined(_M_IX86) |
|
|
251 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
|
|
252 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
253 | #elif defined(_M_AMD64) |
|
|
254 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
|
|
255 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
256 | #elif defined(_M_IA64) |
|
|
257 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
|
|
258 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
116 | else |
259 | #else |
117 | trampoline_count++; |
260 | #error "microsoft libc or architecture not supported" |
118 | } |
|
|
119 | |
|
|
120 | # endif |
261 | #endif |
121 | |
262 | |
|
|
263 | # elif CORO_LINUX |
|
|
264 | |
|
|
265 | _setjmp (ctx->env); |
|
|
266 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
|
|
267 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
|
|
268 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
269 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
|
|
270 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
|
|
271 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); |
|
|
272 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
|
|
273 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
|
|
274 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); |
|
|
275 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
|
|
276 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
|
|
277 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); |
|
|
278 | #else |
|
|
279 | #error "linux libc or architecture not supported" |
|
|
280 | #endif |
|
|
281 | |
|
|
282 | # elif CORO_IRIX |
|
|
283 | |
|
|
284 | sigsetjmp (ctx->env, 0); |
|
|
285 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
|
|
286 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
287 | |
|
|
288 | # elif CORO_ASM |
|
|
289 | |
|
|
290 | ctx->sp = (void **)(ssize + (char *)sptr); |
|
|
291 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
|
|
292 | *--ctx->sp = (void *)coro_init; |
|
|
293 | ctx->sp -= NUM_SAVED; |
|
|
294 | |
|
|
295 | # elif CORO_UCONTEXT |
|
|
296 | |
|
|
297 | getcontext (&(ctx->uc)); |
|
|
298 | |
|
|
299 | ctx->uc.uc_link = 0; |
|
|
300 | ctx->uc.uc_stack.ss_sp = sptr; |
|
|
301 | ctx->uc.uc_stack.ss_size = (size_t)ssize; |
|
|
302 | ctx->uc.uc_stack.ss_flags = 0; |
|
|
303 | |
|
|
304 | makecontext (&(ctx->uc), (void (*)())coro_init, 0); |
|
|
305 | |
122 | #endif |
306 | # endif |
123 | |
307 | |
124 | #if CORO_ASM |
308 | coro_transfer (create_coro, new_coro); |
125 | void __attribute__((__noinline__, __fastcall__)) |
|
|
126 | coro_transfer (struct coro_context *prev, struct coro_context *next) |
|
|
127 | { |
|
|
128 | asm volatile ( |
|
|
129 | #if __amd64 |
|
|
130 | # define NUM_CLOBBERED 5 |
|
|
131 | "push %%rbx\n\t" |
|
|
132 | "push %%r12\n\t" |
|
|
133 | "push %%r13\n\t" |
|
|
134 | "push %%r14\n\t" |
|
|
135 | "push %%r15\n\t" |
|
|
136 | "mov %%rsp, %0\n\t" |
|
|
137 | "mov %1, %%rsp\n\t" |
|
|
138 | "pop %%r15\n\t" |
|
|
139 | "pop %%r14\n\t" |
|
|
140 | "pop %%r13\n\t" |
|
|
141 | "pop %%r12\n\t" |
|
|
142 | "pop %%rbx\n\t" |
|
|
143 | #elif __i386 |
|
|
144 | # define NUM_CLOBBERED 4 |
|
|
145 | "push %%ebx\n\t" |
|
|
146 | "push %%esi\n\t" |
|
|
147 | "push %%edi\n\t" |
|
|
148 | "push %%ebp\n\t" |
|
|
149 | "mov %%esp, %0\n\t" |
|
|
150 | "mov %1, %%esp\n\t" |
|
|
151 | "pop %%ebp\n\t" |
|
|
152 | "pop %%edi\n\t" |
|
|
153 | "pop %%esi\n\t" |
|
|
154 | "pop %%ebx\n\t" |
|
|
155 | #else |
|
|
156 | # error unsupported architecture |
|
|
157 | #endif |
|
|
158 | : "=m" (prev->sp) |
|
|
159 | : "m" (next->sp) |
|
|
160 | ); |
|
|
161 | } |
309 | } |
162 | #endif |
|
|
163 | |
310 | |
|
|
311 | /*****************************************************************************/ |
|
|
312 | /* pthread backend */ |
|
|
313 | /*****************************************************************************/ |
164 | #if CORO_PTHREAD |
314 | #elif CORO_PTHREAD |
165 | |
315 | |
|
|
316 | /* this mutex will be locked by the running coroutine */ |
|
|
317 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
|
|
318 | |
166 | struct coro_init_args { |
319 | struct coro_init_args |
|
|
320 | { |
167 | coro_func func; |
321 | coro_func func; |
168 | void *arg; |
322 | void *arg; |
169 | coro_context *self, *main; |
323 | coro_context *self, *main; |
170 | }; |
324 | }; |
171 | |
325 | |
172 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
326 | static pthread_t null_tid; |
|
|
327 | |
|
|
328 | /* I'd so love to cast pthread_mutex_unlock to void (*)(void *)... */ |
|
|
329 | static void |
|
|
330 | mutex_unlock_wrapper (void *arg) |
|
|
331 | { |
|
|
332 | pthread_mutex_unlock ((pthread_mutex_t *)arg); |
|
|
333 | } |
173 | |
334 | |
174 | static void * |
335 | static void * |
175 | trampoline (void *args_) |
336 | coro_init (void *args_) |
176 | { |
337 | { |
177 | struct coro_init_args *args = (struct coro_init_args *)args_; |
338 | struct coro_init_args *args = (struct coro_init_args *)args_; |
178 | coro_func func = args->func; |
339 | coro_func func = args->func; |
179 | void *arg = args->arg; |
340 | void *arg = args->arg; |
180 | |
341 | |
181 | pthread_mutex_lock (&coro_mutex); |
342 | pthread_mutex_lock (&coro_mutex); |
182 | pthread_cond_destroy (&args->self->c); |
343 | |
|
|
344 | /* we try to be good citizens and use deferred cancellation and cleanup handlers */ |
|
|
345 | pthread_cleanup_push (mutex_unlock_wrapper, &coro_mutex); |
183 | coro_transfer (args->self, args->main); |
346 | coro_transfer (args->self, args->main); |
184 | func (arg); |
347 | func (arg); |
185 | pthread_mutex_unlock (&coro_mutex); |
348 | pthread_cleanup_pop (1); |
186 | |
349 | |
187 | return 0; |
350 | return 0; |
188 | } |
351 | } |
189 | |
352 | |
|
|
353 | void |
190 | void coro_transfer(coro_context *prev, coro_context *next) |
354 | coro_transfer (coro_context *prev, coro_context *next) |
191 | { |
355 | { |
192 | pthread_cond_init (&prev->c, 0); |
|
|
193 | pthread_cond_signal (&next->c); |
356 | pthread_cond_signal (&next->cv); |
194 | pthread_cond_wait (&prev->c, &coro_mutex); |
357 | pthread_cond_wait (&prev->cv, &coro_mutex); |
195 | pthread_cond_destroy (&prev->c); |
|
|
196 | } |
358 | } |
197 | |
359 | |
198 | #endif |
360 | void |
199 | |
361 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
200 | /* initialize a machine state */ |
|
|
201 | void coro_create (coro_context *ctx, |
|
|
202 | coro_func coro, void *arg, |
|
|
203 | void *sptr, long ssize) |
|
|
204 | { |
362 | { |
205 | #if CORO_UCONTEXT |
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206 | |
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207 | getcontext (&(ctx->uc)); |
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208 | |
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209 | ctx->uc.uc_link = 0; |
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210 | ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize); |
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211 | ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize); |
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212 | ctx->uc.uc_stack.ss_flags = 0; |
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213 | |
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214 | makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); |
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215 | |
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216 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
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217 | |
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218 | # if CORO_SJLJ |
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219 | stack_t ostk, nstk; |
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220 | struct sigaction osa, nsa; |
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221 | sigset_t nsig, osig; |
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222 | # endif |
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223 | coro_context nctx; |
363 | static coro_context nctx; |
224 | |
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225 | coro_init_func = coro; |
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226 | coro_init_arg = arg; |
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227 | |
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228 | new_coro = ctx; |
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229 | create_coro = &nctx; |
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230 | |
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231 | # if CORO_SJLJ |
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232 | /* we use SIGUSR2. first block it, then fiddle with it. */ |
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233 | |
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234 | sigemptyset (&nsig); |
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235 | sigaddset (&nsig, SIGUSR2); |
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236 | sigprocmask (SIG_BLOCK, &nsig, &osig); |
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237 | |
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238 | nsa.sa_handler = trampoline; |
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239 | sigemptyset (&nsa.sa_mask); |
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240 | nsa.sa_flags = SA_ONSTACK; |
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241 | |
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242 | if (sigaction (SIGUSR2, &nsa, &osa)) |
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243 | { |
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244 | perror ("sigaction"); |
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245 | abort (); |
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246 | } |
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247 | |
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248 | /* set the new stack */ |
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249 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
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250 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
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251 | nstk.ss_flags = 0; |
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252 | |
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253 | if (sigaltstack (&nstk, &ostk) < 0) |
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254 | { |
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255 | perror ("sigaltstack"); |
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256 | abort (); |
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257 | } |
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258 | |
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259 | trampoline_count = 0; |
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260 | kill (getpid (), SIGUSR2); |
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261 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
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262 | |
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263 | while (!trampoline_count) |
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264 | sigsuspend (&nsig); |
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265 | |
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266 | sigaltstack (0, &nstk); |
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267 | nstk.ss_flags = SS_DISABLE; |
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268 | if (sigaltstack (&nstk, 0) < 0) |
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269 | perror ("sigaltstack"); |
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270 | |
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271 | sigaltstack (0, &nstk); |
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272 | if (~nstk.ss_flags & SS_DISABLE) |
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273 | abort (); |
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274 | |
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275 | if (~ostk.ss_flags & SS_DISABLE) |
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276 | sigaltstack (&ostk, 0); |
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277 | |
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278 | sigaction (SIGUSR2, &osa, 0); |
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279 | |
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280 | sigprocmask (SIG_SETMASK, &osig, 0); |
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281 | |
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282 | # elif CORO_LOSER |
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283 | |
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284 | setjmp (ctx->env); |
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285 | #if __CYGWIN__ |
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286 | ctx->env[7] = (long)((char *)sptr + ssize); |
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287 | ctx->env[8] = (long)coro_init; |
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288 | #elif defined(_M_IX86) |
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289 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
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290 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize); |
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291 | #elif defined(_M_AMD64) |
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292 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
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293 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize); |
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294 | #elif defined(_M_IA64) |
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295 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
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296 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize); |
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297 | #else |
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298 | # error "microsoft libc or architecture not supported" |
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299 | #endif |
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300 | |
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301 | # elif CORO_LINUX |
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302 | |
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303 | _setjmp (ctx->env); |
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304 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
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305 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
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306 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
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307 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
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308 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
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309 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
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310 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
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311 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
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312 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
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313 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
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314 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
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315 | ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
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316 | #else |
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317 | # error "linux libc or architecture not supported" |
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318 | #endif |
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319 | |
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320 | # elif CORO_IRIX |
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321 | |
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322 | setjmp (ctx->env); |
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323 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
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324 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize); |
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325 | |
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326 | # elif CORO_ASM |
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327 | |
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328 | ctx->sp = (volatile void **)(ssize + (char *)sptr); |
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329 | *--ctx->sp = (void *)coro_init; |
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330 | *--ctx->sp = (void *)coro_init; // this is needed when the prologue saves ebp |
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331 | ctx->sp -= NUM_CLOBBERED; |
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332 | |
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333 | # endif |
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334 | |
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335 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
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336 | |
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337 | # elif CORO_PTHREAD |
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338 | |
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339 | pthread_t id; |
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340 | pthread_attr_t attr; |
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341 | coro_context nctx; |
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342 | struct coro_init_args args; |
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343 | static int once; |
364 | static int once; |
344 | |
365 | |
345 | if (!once) |
366 | if (!once) |
346 | { |
367 | { |
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368 | once = 1; |
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369 | |
347 | pthread_mutex_lock (&coro_mutex); |
370 | pthread_mutex_lock (&coro_mutex); |
348 | once = 1; |
371 | pthread_cond_init (&nctx.cv, 0); |
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372 | null_tid = pthread_self (); |
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373 | } |
|
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374 | |
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375 | pthread_cond_init (&ctx->cv, 0); |
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376 | |
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377 | if (coro) |
349 | } |
378 | { |
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379 | pthread_attr_t attr; |
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380 | struct coro_init_args args; |
350 | |
381 | |
351 | args.func = coro; |
382 | args.func = coro; |
352 | args.arg = arg; |
383 | args.arg = arg; |
353 | args.self = ctx; |
384 | args.self = ctx; |
354 | args.main = &nctx; |
385 | args.main = &nctx; |
355 | |
386 | |
356 | pthread_attr_init (&attr); |
387 | pthread_attr_init (&attr); |
357 | pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
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358 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
388 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
|
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389 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
359 | pthread_create (&id, &attr, trampoline, &args); |
390 | pthread_create (&ctx->id, &attr, coro_init, &args); |
360 | |
391 | |
361 | pthread_cond_init (&args.self->c, 0); |
|
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362 | coro_transfer (args.main, args.self); |
392 | coro_transfer (args.main, args.self); |
|
|
393 | } |
|
|
394 | else |
|
|
395 | ctx->id = null_tid; |
|
|
396 | } |
|
|
397 | |
|
|
398 | void |
|
|
399 | coro_destroy (coro_context *ctx) |
|
|
400 | { |
|
|
401 | if (!pthread_equal (ctx->id, null_tid)) |
|
|
402 | { |
|
|
403 | pthread_cancel (ctx->id); |
|
|
404 | pthread_mutex_unlock (&coro_mutex); |
|
|
405 | pthread_join (ctx->id, 0); |
|
|
406 | pthread_mutex_lock (&coro_mutex); |
|
|
407 | } |
|
|
408 | |
|
|
409 | pthread_cond_destroy (&ctx->cv); |
|
|
410 | } |
363 | |
411 | |
364 | #else |
412 | #else |
365 | # error unsupported backend |
413 | # error unsupported backend |
366 | #endif |
414 | #endif |
367 | } |
|
|
368 | |
415 | |