1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2006 Marc Alexander Lehmann <schmorp@schmorp.de> |
2 | * Copyright (c) 2001-2009 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, |
8 | * this list of conditions and the following disclaimer. |
8 | * this list of conditions and the following disclaimer. |
9 | * |
9 | * |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
12 | * documentation and/or other materials provided with the distribution. |
13 | * |
|
|
14 | * 3. The name of the author may not be used to endorse or promote products |
|
|
15 | * derived from this software without specific prior written permission. |
|
|
16 | * |
13 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
15 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
19 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
16 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
20 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
17 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
… | |
… | |
23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
20 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
21 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
25 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
22 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
23 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * |
24 | * |
|
|
25 | * Alternatively, the contents of this file may be used under the terms of |
|
|
26 | * the GNU General Public License ("GPL") version 2 or any later version, |
|
|
27 | * in which case the provisions of the GPL are applicable instead of |
|
|
28 | * the above. If you wish to allow the use of your version of this file |
|
|
29 | * only under the terms of the GPL and not to allow others to use your |
|
|
30 | * version of this file under the BSD license, indicate your decision |
|
|
31 | * by deleting the provisions above and replace them with the notice |
|
|
32 | * and other provisions required by the GPL. If you do not delete the |
|
|
33 | * provisions above, a recipient may use your version of this file under |
|
|
34 | * either the BSD or the GPL. |
|
|
35 | * |
28 | * This library is modelled strictly after Ralf S. Engelschalls article at |
36 | * 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 |
37 | * http://www.gnu.org/software/pth/rse-pmt.ps. So most of the credit must |
30 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
38 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
31 | */ |
39 | */ |
32 | |
40 | |
33 | #include "coro.h" |
41 | #include "coro.h" |
34 | |
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 | |
35 | #if !defined(STACK_ADJUST_PTR) |
54 | # if !defined(STACK_ADJUST_PTR) |
|
|
55 | # if __sgi |
36 | /* IRIX is decidedly NON-unix */ |
56 | /* IRIX is decidedly NON-unix */ |
37 | # if __sgi |
|
|
38 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
57 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
39 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
58 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
40 | # elif __i386__ && CORO_LINUX |
59 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
41 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
60 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
42 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
61 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
43 | # elif __amd64__ && CORO_LINUX |
62 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
44 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
63 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
45 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
64 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
46 | # else |
65 | # else |
47 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
66 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
48 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
67 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
49 | # endif |
68 | # endif |
50 | #endif |
69 | # endif |
51 | |
70 | |
52 | #if CORO_UCONTEXT |
|
|
53 | # include <stddef.h> |
|
|
54 | #endif |
|
|
55 | |
|
|
56 | #if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
|
|
57 | |
|
|
58 | #include <stdlib.h> |
71 | # include <stdlib.h> |
59 | |
72 | |
60 | #if CORO_SJLJ |
73 | # if CORO_SJLJ |
61 | # include <stdio.h> |
74 | # include <stdio.h> |
62 | # include <signal.h> |
75 | # include <signal.h> |
63 | # include <unistd.h> |
76 | # include <unistd.h> |
64 | #endif |
77 | # endif |
65 | |
78 | |
66 | static volatile coro_func coro_init_func; |
79 | static coro_func coro_init_func; |
67 | static volatile void *coro_init_arg; |
80 | static void *coro_init_arg; |
68 | static volatile coro_context *new_coro, *create_coro; |
81 | static coro_context *new_coro, *create_coro; |
69 | |
|
|
70 | /* what we really want to detect here is wether we use a new-enough version of GAS */ |
|
|
71 | /* instead, check for gcc 3 and ELF and hope for the best */ |
|
|
72 | #if __GNUC__ >= 3 && __ELF__ |
|
|
73 | # define HAVE_CFI 1 |
|
|
74 | #endif |
|
|
75 | |
82 | |
76 | static void |
83 | static void |
77 | coro_init (void) |
84 | coro_init (void) |
78 | { |
85 | { |
79 | volatile coro_func func = coro_init_func; |
86 | volatile coro_func func = coro_init_func; |
80 | volatile void *arg = coro_init_arg; |
87 | volatile void *arg = coro_init_arg; |
81 | |
88 | |
82 | coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); |
89 | coro_transfer (new_coro, create_coro); |
83 | |
90 | |
84 | func ((void *)arg); |
91 | func ((void *)arg); |
85 | |
92 | |
86 | /* the new coro returned. bad. just abort() for now */ |
93 | /* the new coro returned. bad. just abort() for now */ |
87 | abort (); |
94 | abort (); |
88 | } |
95 | } |
89 | |
96 | |
90 | # if CORO_SJLJ |
97 | # if CORO_SJLJ |
91 | |
98 | |
92 | static volatile int trampoline_count; |
99 | static volatile int trampoline_done; |
93 | |
100 | |
94 | /* trampoline signal handler */ |
101 | /* trampoline signal handler */ |
95 | static void |
102 | static void |
96 | trampoline (int sig) |
103 | trampoline (int sig) |
97 | { |
104 | { |
98 | if (setjmp (((coro_context *)new_coro)->env)) |
105 | if (coro_setjmp (new_coro->env)) |
99 | { |
|
|
100 | #if HAVE_CFI |
|
|
101 | asm (".cfi_startproc"); |
|
|
102 | #endif |
|
|
103 | coro_init (); /* start it */ |
106 | coro_init (); /* start it */ |
104 | #if HAVE_CFI |
|
|
105 | asm (".cfi_endproc"); |
|
|
106 | #endif |
|
|
107 | } |
|
|
108 | else |
107 | else |
109 | trampoline_count++; |
108 | trampoline_done = 1; |
110 | } |
109 | } |
111 | |
110 | |
112 | # endif |
|
|
113 | |
|
|
114 | #endif |
111 | # endif |
115 | |
112 | |
116 | #if CORO_ASM |
113 | # if CORO_ASM |
117 | void __attribute__((__noinline__, __fastcall__)) |
114 | |
118 | coro_transfer (struct coro_context *prev, struct coro_context *next) |
115 | asm ( |
119 | { |
116 | ".text\n" |
120 | asm volatile ( |
117 | ".globl coro_transfer\n" |
|
|
118 | ".type coro_transfer, @function\n" |
|
|
119 | "coro_transfer:\n" |
|
|
120 | /* windows, of course, gives a shit on the amd64 ABI and uses different registers */ |
|
|
121 | /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */ |
121 | #if __amd64 |
122 | #if __amd64 |
122 | # define NUM_CLOBBERED 5 |
123 | #define NUM_SAVED 6 |
|
|
124 | "\tpush %rbp\n" |
123 | "push %%rbx\n\t" |
125 | "\tpush %rbx\n" |
124 | "push %%r12\n\t" |
126 | "\tpush %r12\n" |
125 | "push %%r13\n\t" |
127 | "\tpush %r13\n" |
126 | "push %%r14\n\t" |
128 | "\tpush %r14\n" |
127 | "push %%r15\n\t" |
129 | "\tpush %r15\n" |
128 | "mov %%rsp, %0\n\t" |
130 | #if CORO_WIN_TIB |
129 | "mov %1, %%rsp\n\t" |
131 | "\tpush %gs:0x0\n" |
|
|
132 | "\tpush %gs:0x8\n" |
|
|
133 | "\tpush %gs:0xc\n" |
|
|
134 | #endif |
|
|
135 | "\tmov %rsp, (%rdi)\n" |
|
|
136 | "\tmov (%rsi), %rsp\n" |
|
|
137 | #if CORO_WIN_TIB |
|
|
138 | "\tpop %gs:0xc\n" |
|
|
139 | "\tpop %gs:0x8\n" |
|
|
140 | "\tpop %gs:0x0\n" |
|
|
141 | #endif |
130 | "pop %%r15\n\t" |
142 | "\tpop %r15\n" |
131 | "pop %%r14\n\t" |
143 | "\tpop %r14\n" |
132 | "pop %%r13\n\t" |
144 | "\tpop %r13\n" |
133 | "pop %%r12\n\t" |
145 | "\tpop %r12\n" |
134 | "pop %%rbx\n\t" |
146 | "\tpop %rbx\n" |
|
|
147 | "\tpop %rbp\n" |
135 | #elif __i386 |
148 | #elif __i386 |
136 | # define NUM_CLOBBERED 4 |
149 | #define NUM_SAVED 4 |
137 | "push %%ebx\n\t" |
|
|
138 | "push %%esi\n\t" |
|
|
139 | "push %%edi\n\t" |
|
|
140 | "push %%ebp\n\t" |
150 | "\tpush %ebp\n" |
141 | "mov %%esp, %0\n\t" |
151 | "\tpush %ebx\n" |
142 | "mov %1, %%esp\n\t" |
152 | "\tpush %esi\n" |
143 | "pop %%ebp\n\t" |
153 | "\tpush %edi\n" |
|
|
154 | #if CORO_WIN_TIB |
|
|
155 | "\tpush %fs:0\n" |
|
|
156 | "\tpush %fs:4\n" |
|
|
157 | "\tpush %fs:8\n" |
|
|
158 | #endif |
|
|
159 | "\tmov %esp, (%eax)\n" |
|
|
160 | "\tmov (%edx), %esp\n" |
|
|
161 | #if CORO_WIN_TIB |
|
|
162 | "\tpop %fs:8\n" |
|
|
163 | "\tpop %fs:4\n" |
|
|
164 | "\tpop %fs:0\n" |
|
|
165 | #endif |
144 | "pop %%edi\n\t" |
166 | "\tpop %edi\n" |
145 | "pop %%esi\n\t" |
167 | "\tpop %esi\n" |
146 | "pop %%ebx\n\t" |
168 | "\tpop %ebx\n" |
147 | #else |
169 | "\tpop %ebp\n" |
|
|
170 | #else |
148 | # error unsupported architecture |
171 | #error unsupported architecture |
149 | #endif |
172 | #endif |
150 | : "=m" (prev->sp) |
173 | "\tret\n" |
151 | : "m" (next->sp) |
|
|
152 | ); |
174 | ); |
153 | } |
175 | |
154 | #endif |
176 | # endif |
155 | |
177 | |
156 | /* initialize a machine state */ |
178 | void |
157 | void coro_create (coro_context *ctx, |
179 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
158 | coro_func coro, void *arg, |
|
|
159 | void *sptr, long ssize) |
|
|
160 | { |
180 | { |
161 | #if CORO_UCONTEXT |
181 | coro_context nctx; |
162 | |
|
|
163 | getcontext (&(ctx->uc)); |
|
|
164 | |
|
|
165 | ctx->uc.uc_link = 0; |
|
|
166 | ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize); |
|
|
167 | ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize); |
|
|
168 | ctx->uc.uc_stack.ss_flags = 0; |
|
|
169 | |
|
|
170 | makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); |
|
|
171 | |
|
|
172 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
|
|
173 | |
|
|
174 | # if CORO_SJLJ |
182 | # if CORO_SJLJ |
175 | stack_t ostk, nstk; |
183 | stack_t ostk, nstk; |
176 | struct sigaction osa, nsa; |
184 | struct sigaction osa, nsa; |
177 | sigset_t nsig, osig; |
185 | sigset_t nsig, osig; |
178 | # endif |
186 | # endif |
179 | coro_context nctx; |
187 | |
|
|
188 | if (!coro) |
|
|
189 | return; |
180 | |
190 | |
181 | coro_init_func = coro; |
191 | coro_init_func = coro; |
182 | coro_init_arg = arg; |
192 | coro_init_arg = arg; |
183 | |
193 | |
184 | new_coro = ctx; |
194 | new_coro = ctx; |
… | |
… | |
210 | { |
220 | { |
211 | perror ("sigaltstack"); |
221 | perror ("sigaltstack"); |
212 | abort (); |
222 | abort (); |
213 | } |
223 | } |
214 | |
224 | |
215 | trampoline_count = 0; |
225 | trampoline_done = 0; |
216 | kill (getpid (), SIGUSR2); |
226 | kill (getpid (), SIGUSR2); |
217 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
227 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
218 | |
228 | |
219 | while (!trampoline_count) |
229 | while (!trampoline_done) |
220 | sigsuspend (&nsig); |
230 | sigsuspend (&nsig); |
221 | |
231 | |
222 | sigaltstack (0, &nstk); |
232 | sigaltstack (0, &nstk); |
223 | nstk.ss_flags = SS_DISABLE; |
233 | nstk.ss_flags = SS_DISABLE; |
224 | if (sigaltstack (&nstk, 0) < 0) |
234 | if (sigaltstack (&nstk, 0) < 0) |
… | |
… | |
230 | |
240 | |
231 | if (~ostk.ss_flags & SS_DISABLE) |
241 | if (~ostk.ss_flags & SS_DISABLE) |
232 | sigaltstack (&ostk, 0); |
242 | sigaltstack (&ostk, 0); |
233 | |
243 | |
234 | sigaction (SIGUSR2, &osa, 0); |
244 | sigaction (SIGUSR2, &osa, 0); |
235 | |
|
|
236 | sigprocmask (SIG_SETMASK, &osig, 0); |
245 | sigprocmask (SIG_SETMASK, &osig, 0); |
237 | |
246 | |
238 | # elif CORO_LOSER |
247 | # elif CORO_LOSER |
239 | |
248 | |
240 | setjmp (ctx->env); |
249 | coro_setjmp (ctx->env); |
241 | #if __CYGWIN__ |
250 | #if __CYGWIN__ && __i386 |
242 | ctx->env[7] = (long)((char *)sptr + ssize); |
251 | ctx->env[8] = (long) coro_init; |
243 | ctx->env[8] = (long)coro_init; |
252 | ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long); |
|
|
253 | #elif __CYGWIN__ && __x86_64 |
|
|
254 | ctx->env[7] = (long) coro_init; |
|
|
255 | ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long); |
|
|
256 | #elif defined(__MINGW32__) |
|
|
257 | ctx->env[5] = (long) coro_init; |
|
|
258 | ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long); |
244 | #elif defined(_M_IX86) |
259 | #elif defined(_M_IX86) |
245 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
260 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init; |
246 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr,ssize); |
261 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
247 | #elif defined(_M_AMD64) |
262 | #elif defined(_M_AMD64) |
248 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
263 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init; |
249 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr,ssize); |
264 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
250 | #elif defined(_M_IA64) |
265 | #elif defined(_M_IA64) |
251 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
266 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init; |
252 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr,ssize); |
267 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
|
|
268 | #else |
|
|
269 | #error "microsoft libc or architecture not supported" |
|
|
270 | #endif |
|
|
271 | |
|
|
272 | # elif CORO_LINUX |
|
|
273 | |
|
|
274 | coro_setjmp (ctx->env); |
|
|
275 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
|
|
276 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
|
|
277 | ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
278 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
|
|
279 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
|
|
280 | ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long); |
|
|
281 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
|
|
282 | ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init; |
|
|
283 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
|
|
284 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
|
|
285 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
|
|
286 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
|
|
287 | #else |
|
|
288 | #error "linux libc or architecture not supported" |
|
|
289 | #endif |
|
|
290 | |
|
|
291 | # elif CORO_IRIX |
|
|
292 | |
|
|
293 | coro_setjmp (ctx->env, 0); |
|
|
294 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
|
|
295 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
296 | |
|
|
297 | # elif CORO_ASM |
|
|
298 | |
|
|
299 | ctx->sp = (void **)(ssize + (char *)sptr); |
|
|
300 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
|
|
301 | *--ctx->sp = (void *)coro_init; |
|
|
302 | |
|
|
303 | #if CORO_WIN_TIB |
|
|
304 | *--ctx->sp = 0; /* ExceptionList */ |
|
|
305 | *--ctx->sp = (char *)sptr + ssize; /* StackBase */ |
|
|
306 | *--ctx->sp = sptr; /* StackLimit */ |
|
|
307 | #endif |
|
|
308 | |
|
|
309 | ctx->sp -= NUM_SAVED; |
|
|
310 | |
|
|
311 | # elif CORO_UCONTEXT |
|
|
312 | |
|
|
313 | getcontext (&(ctx->uc)); |
|
|
314 | |
|
|
315 | ctx->uc.uc_link = 0; |
|
|
316 | ctx->uc.uc_stack.ss_sp = sptr; |
|
|
317 | ctx->uc.uc_stack.ss_size = (size_t)ssize; |
|
|
318 | ctx->uc.uc_stack.ss_flags = 0; |
|
|
319 | |
|
|
320 | makecontext (&(ctx->uc), (void (*)())coro_init, 0); |
|
|
321 | |
|
|
322 | # endif |
|
|
323 | |
|
|
324 | coro_transfer (create_coro, new_coro); |
|
|
325 | } |
|
|
326 | |
|
|
327 | /*****************************************************************************/ |
|
|
328 | /* pthread backend */ |
|
|
329 | /*****************************************************************************/ |
|
|
330 | #elif CORO_PTHREAD |
|
|
331 | |
|
|
332 | /* this mutex will be locked by the running coroutine */ |
|
|
333 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
|
|
334 | |
|
|
335 | struct coro_init_args |
|
|
336 | { |
|
|
337 | coro_func func; |
|
|
338 | void *arg; |
|
|
339 | coro_context *self, *main; |
|
|
340 | }; |
|
|
341 | |
|
|
342 | static pthread_t null_tid; |
|
|
343 | |
|
|
344 | /* I'd so love to cast pthread_mutex_unlock to void (*)(void *)... */ |
|
|
345 | static void |
|
|
346 | mutex_unlock_wrapper (void *arg) |
|
|
347 | { |
|
|
348 | pthread_mutex_unlock ((pthread_mutex_t *)arg); |
|
|
349 | } |
|
|
350 | |
|
|
351 | static void * |
|
|
352 | coro_init (void *args_) |
|
|
353 | { |
|
|
354 | struct coro_init_args *args = (struct coro_init_args *)args_; |
|
|
355 | coro_func func = args->func; |
|
|
356 | void *arg = args->arg; |
|
|
357 | |
|
|
358 | pthread_mutex_lock (&coro_mutex); |
|
|
359 | |
|
|
360 | /* we try to be good citizens and use deferred cancellation and cleanup handlers */ |
|
|
361 | pthread_cleanup_push (mutex_unlock_wrapper, &coro_mutex); |
|
|
362 | coro_transfer (args->self, args->main); |
|
|
363 | func (arg); |
|
|
364 | pthread_cleanup_pop (1); |
|
|
365 | |
|
|
366 | return 0; |
|
|
367 | } |
|
|
368 | |
|
|
369 | void |
|
|
370 | coro_transfer (coro_context *prev, coro_context *next) |
|
|
371 | { |
|
|
372 | pthread_cond_signal (&next->cv); |
|
|
373 | pthread_cond_wait (&prev->cv, &coro_mutex); |
|
|
374 | #if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */ |
|
|
375 | pthread_testcancel (); |
|
|
376 | #endif |
|
|
377 | } |
|
|
378 | |
|
|
379 | void |
|
|
380 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
|
|
381 | { |
|
|
382 | static coro_context nctx; |
|
|
383 | static int once; |
|
|
384 | |
|
|
385 | if (!once) |
|
|
386 | { |
|
|
387 | once = 1; |
|
|
388 | |
|
|
389 | pthread_mutex_lock (&coro_mutex); |
|
|
390 | pthread_cond_init (&nctx.cv, 0); |
|
|
391 | null_tid = pthread_self (); |
|
|
392 | } |
|
|
393 | |
|
|
394 | pthread_cond_init (&ctx->cv, 0); |
|
|
395 | |
|
|
396 | if (coro) |
|
|
397 | { |
|
|
398 | pthread_attr_t attr; |
|
|
399 | struct coro_init_args args; |
|
|
400 | |
|
|
401 | args.func = coro; |
|
|
402 | args.arg = arg; |
|
|
403 | args.self = ctx; |
|
|
404 | args.main = &nctx; |
|
|
405 | |
|
|
406 | pthread_attr_init (&attr); |
|
|
407 | #if __UCLIBC__ |
|
|
408 | pthread_attr_setstacksize (&attr, (size_t)ssize); |
253 | #else |
409 | #else |
254 | #error "microsoft libc or architecture not supported" |
410 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
255 | #endif |
411 | #endif |
|
|
412 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
|
|
413 | pthread_create (&ctx->id, &attr, coro_init, &args); |
256 | |
414 | |
257 | # elif CORO_LINUX |
415 | coro_transfer (args.main, args.self); |
|
|
416 | } |
|
|
417 | else |
|
|
418 | ctx->id = null_tid; |
|
|
419 | } |
258 | |
420 | |
259 | _setjmp (ctx->env); |
421 | void |
260 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
422 | coro_destroy (coro_context *ctx) |
261 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
423 | { |
262 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
424 | if (!pthread_equal (ctx->id, null_tid)) |
263 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
425 | { |
264 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
426 | pthread_cancel (ctx->id); |
265 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
427 | pthread_mutex_unlock (&coro_mutex); |
266 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
428 | pthread_join (ctx->id, 0); |
267 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
429 | pthread_mutex_lock (&coro_mutex); |
268 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
430 | } |
269 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
431 | |
270 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
432 | pthread_cond_destroy (&ctx->cv); |
271 | ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
433 | } |
|
|
434 | |
272 | #else |
435 | #else |
273 | # error "linux libc or architecture not supported" |
436 | # error unsupported backend |
274 | #endif |
437 | #endif |
275 | |
438 | |
276 | # elif CORO_IRIX |
|
|
277 | |
|
|
278 | setjmp (ctx->env); |
|
|
279 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
|
|
280 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize); |
|
|
281 | |
|
|
282 | # elif CORO_ASM |
|
|
283 | |
|
|
284 | ctx->sp = (volatile void **)(ssize + (char *)sptr); |
|
|
285 | *--ctx->sp = (void *)coro_init; |
|
|
286 | *--ctx->sp = (void *)coro_init; // this is needed when the prologue saves ebp |
|
|
287 | ctx->sp -= NUM_CLOBBERED; |
|
|
288 | |
|
|
289 | # endif |
|
|
290 | |
|
|
291 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
|
|
292 | |
|
|
293 | #else |
|
|
294 | # error unsupported architecture |
|
|
295 | #endif |
|
|
296 | } |
|
|
297 | |
|
|