1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2005 Marc Alexander Lehmann <schmorp@schmorp.de> |
2 | * Copyright (c) 2001-2011 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 | * |
13 | * |
14 | * 3. The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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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- |
21 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
18 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
… | |
… | |
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 | * |
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25 | * Alternatively, the contents of this file may be used under the terms of |
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26 | * the GNU General Public License ("GPL") version 2 or any later version, |
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27 | * in which case the provisions of the GPL are applicable instead of |
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28 | * the above. If you wish to allow the use of your version of this file |
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29 | * only under the terms of the GPL and not to allow others to use your |
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30 | * version of this file under the BSD license, indicate your decision |
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31 | * by deleting the provisions above and replace them with the notice |
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32 | * and other provisions required by the GPL. If you do not delete the |
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33 | * provisions above, a recipient may use your version of this file under |
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34 | * either the BSD or the GPL. |
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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 | |
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43 | #include <string.h> |
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44 | |
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45 | /*****************************************************************************/ |
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46 | /* ucontext/setjmp/asm backends */ |
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47 | /*****************************************************************************/ |
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48 | #if CORO_UCONTEXT || CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
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49 | |
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50 | # if CORO_UCONTEXT |
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51 | # include <stddef.h> |
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52 | # endif |
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53 | |
35 | #if !defined(STACK_ADJUST_PTR) |
54 | # if !defined(STACK_ADJUST_PTR) |
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55 | # if __sgi |
36 | /* IRIX is decidedly NON-unix */ |
56 | /* IRIX is decidedly NON-unix */ |
37 | # if __sgi |
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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 | # else |
62 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
44 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
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) |
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65 | # else |
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66 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
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67 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
46 | # endif |
68 | # endif |
47 | #endif |
69 | # endif |
48 | |
70 | |
49 | #if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX |
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50 | |
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51 | #include <stdlib.h> |
71 | # include <stdlib.h> |
52 | |
72 | |
53 | #if CORO_SJLJ |
73 | # if CORO_SJLJ |
54 | # include <stdio.h> |
74 | # include <stdio.h> |
55 | # include <signal.h> |
75 | # include <signal.h> |
56 | # include <unistd.h> |
76 | # include <unistd.h> |
57 | #endif |
77 | # endif |
58 | |
78 | |
59 | static volatile coro_func coro_init_func; |
79 | static coro_func coro_init_func; |
60 | static volatile void *coro_init_arg; |
80 | static void *coro_init_arg; |
61 | static volatile coro_context *new_coro, *create_coro; |
81 | static coro_context *new_coro, *create_coro; |
62 | |
82 | |
63 | static void |
83 | static void |
64 | coro_init (void) |
84 | coro_init (void) |
65 | { |
85 | { |
66 | volatile coro_func func = coro_init_func; |
86 | volatile coro_func func = coro_init_func; |
67 | volatile void *arg = coro_init_arg; |
87 | volatile void *arg = coro_init_arg; |
68 | |
88 | |
69 | coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); |
89 | coro_transfer (new_coro, create_coro); |
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90 | |
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91 | #if __GCC_HAVE_DWARF2_CFI_ASM && __amd64 |
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92 | asm (".cfi_undefined rip"); |
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93 | #endif |
70 | |
94 | |
71 | func ((void *)arg); |
95 | func ((void *)arg); |
72 | |
96 | |
73 | /* the new coro returned. bad. just abort() for now */ |
97 | /* the new coro returned. bad. just abort() for now */ |
74 | abort (); |
98 | abort (); |
75 | } |
99 | } |
76 | |
100 | |
77 | # if CORO_SJLJ |
101 | # if CORO_SJLJ |
78 | |
102 | |
79 | static volatile int trampoline_count; |
103 | static volatile int trampoline_done; |
80 | |
104 | |
81 | /* trampoline signal handler */ |
105 | /* trampoline signal handler */ |
82 | static void |
106 | static void |
83 | trampoline (int sig) |
107 | trampoline (int sig) |
84 | { |
108 | { |
85 | if (setjmp (((coro_context *)new_coro)->env)) |
109 | if (coro_setjmp (new_coro->env)) |
86 | coro_init (); /* start it */ |
110 | coro_init (); /* start it */ |
87 | else |
111 | else |
88 | trampoline_count++; |
112 | trampoline_done = 1; |
89 | } |
113 | } |
90 | |
114 | |
91 | # endif |
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92 | |
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93 | #endif |
115 | # endif |
94 | |
116 | |
95 | /* initialize a machine state */ |
117 | # if CORO_ASM |
96 | void coro_create(coro_context *ctx, |
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97 | coro_func coro, void *arg, |
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98 | void *sptr, long ssize) |
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99 | { |
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100 | #if CORO_UCONTEXT |
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101 | |
118 | |
102 | getcontext (&(ctx->uc)); |
119 | #if _WIN32 || __CYGWIN__ |
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120 | #define CORO_WIN_TIB 1 |
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121 | #endif |
103 | |
122 | |
104 | ctx->uc.uc_link = 0; |
123 | asm ( |
105 | ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize); |
124 | "\t.text\n" |
106 | ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize); |
125 | #if _WIN32 || __CYGWIN__ |
107 | ctx->uc.uc_stack.ss_flags = 0; |
126 | "\t.globl _coro_transfer\n" |
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127 | "_coro_transfer:\n" |
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128 | #else |
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129 | "\t.globl coro_transfer\n" |
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130 | "coro_transfer:\n" |
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131 | #endif |
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132 | /* windows, of course, gives a shit on the amd64 ABI and uses different registers */ |
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133 | /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */ |
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134 | #if __amd64 |
108 | |
135 | |
109 | makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); |
136 | #if _WIN32 || __CYGWIN__ |
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137 | #define NUM_SAVED 29 |
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138 | "\tsubq $168, %rsp\t" /* one dummy qword to improve alignment */ |
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139 | "\tmovaps %xmm6, (%rsp)\n" |
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140 | "\tmovaps %xmm7, 16(%rsp)\n" |
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141 | "\tmovaps %xmm8, 32(%rsp)\n" |
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142 | "\tmovaps %xmm9, 48(%rsp)\n" |
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143 | "\tmovaps %xmm10, 64(%rsp)\n" |
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144 | "\tmovaps %xmm11, 80(%rsp)\n" |
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145 | "\tmovaps %xmm12, 96(%rsp)\n" |
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146 | "\tmovaps %xmm13, 112(%rsp)\n" |
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147 | "\tmovaps %xmm14, 128(%rsp)\n" |
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148 | "\tmovaps %xmm15, 144(%rsp)\n" |
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149 | "\tpushq %rsi\n" |
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150 | "\tpushq %rdi\n" |
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151 | "\tpushq %rbp\n" |
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152 | "\tpushq %rbx\n" |
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153 | "\tpushq %r12\n" |
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154 | "\tpushq %r13\n" |
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155 | "\tpushq %r14\n" |
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156 | "\tpushq %r15\n" |
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157 | #if CORO_WIN_TIB |
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158 | "\tpushq %fs:0x0\n" |
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159 | "\tpushq %fs:0x8\n" |
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160 | "\tpushq %fs:0xc\n" |
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161 | #endif |
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162 | "\tmovq %rsp, (%rcx)\n" |
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163 | "\tmovq (%rdx), %rsp\n" |
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164 | #if CORO_WIN_TIB |
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165 | "\tpopq %fs:0xc\n" |
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166 | "\tpopq %fs:0x8\n" |
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167 | "\tpopq %fs:0x0\n" |
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168 | #endif |
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169 | "\tpopq %r15\n" |
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170 | "\tpopq %r14\n" |
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171 | "\tpopq %r13\n" |
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172 | "\tpopq %r12\n" |
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173 | "\tpopq %rbx\n" |
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174 | "\tpopq %rbp\n" |
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175 | "\tpopq %rdi\n" |
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176 | "\tpopq %rsi\n" |
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177 | "\tmovaps (%rsp), %xmm6\n" |
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178 | "\tmovaps 16(%rsp), %xmm7\n" |
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179 | "\tmovaps 32(%rsp), %xmm8\n" |
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180 | "\tmovaps 48(%rsp), %xmm9\n" |
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181 | "\tmovaps 64(%rsp), %xmm10\n" |
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182 | "\tmovaps 80(%rsp), %xmm11\n" |
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183 | "\tmovaps 96(%rsp), %xmm12\n" |
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184 | "\tmovaps 112(%rsp), %xmm13\n" |
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185 | "\tmovaps 128(%rsp), %xmm14\n" |
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186 | "\tmovaps 144(%rsp), %xmm15\n" |
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187 | "\taddq $168, %rsp\n" |
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188 | #else |
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189 | #define NUM_SAVED 6 |
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190 | "\tpushq %rbp\n" |
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191 | "\tpushq %rbx\n" |
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192 | "\tpushq %r12\n" |
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193 | "\tpushq %r13\n" |
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194 | "\tpushq %r14\n" |
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195 | "\tpushq %r15\n" |
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196 | "\tmovq %rsp, (%rdi)\n" |
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197 | "\tmovq (%rsi), %rsp\n" |
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198 | "\tpopq %r15\n" |
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199 | "\tpopq %r14\n" |
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200 | "\tpopq %r13\n" |
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201 | "\tpopq %r12\n" |
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202 | "\tpopq %rbx\n" |
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203 | "\tpopq %rbp\n" |
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204 | #endif |
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205 | "\tpopq %rcx\n" |
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206 | "\tjmpq *%rcx\n" |
110 | |
207 | |
111 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX |
208 | #elif __i386 |
112 | |
209 | |
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210 | #define NUM_SAVED 4 |
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211 | "\tpushl %ebp\n" |
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212 | "\tpushl %ebx\n" |
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213 | "\tpushl %esi\n" |
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214 | "\tpushl %edi\n" |
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215 | #if CORO_WIN_TIB |
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216 | #undef NUM_SAVED |
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217 | #define NUM_SAVED 7 |
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218 | "\tpushl %fs:0\n" |
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219 | "\tpushl %fs:4\n" |
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220 | "\tpushl %fs:8\n" |
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221 | #endif |
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222 | "\tmovl %esp, (%eax)\n" |
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223 | "\tmovl (%edx), %esp\n" |
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224 | #if CORO_WIN_TIB |
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225 | "\tpopl %fs:8\n" |
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226 | "\tpopl %fs:4\n" |
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227 | "\tpopl %fs:0\n" |
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228 | #endif |
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229 | "\tpopl %edi\n" |
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230 | "\tpopl %esi\n" |
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231 | "\tpopl %ebx\n" |
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232 | "\tpopl %ebp\n" |
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233 | "\tpopl %ecx\n" |
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234 | "\tjmpl *%ecx\n" |
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235 | |
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236 | #else |
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237 | #error unsupported architecture |
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238 | #endif |
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239 | ); |
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240 | |
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241 | # endif |
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242 | |
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243 | void |
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244 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
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245 | { |
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246 | coro_context nctx; |
113 | # if CORO_SJLJ |
247 | # if CORO_SJLJ |
114 | stack_t ostk, nstk; |
248 | stack_t ostk, nstk; |
115 | struct sigaction osa, nsa; |
249 | struct sigaction osa, nsa; |
116 | sigset_t nsig, osig; |
250 | sigset_t nsig, osig; |
117 | # endif |
251 | # endif |
118 | coro_context nctx; |
252 | |
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253 | if (!coro) |
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254 | return; |
119 | |
255 | |
120 | coro_init_func = coro; |
256 | coro_init_func = coro; |
121 | coro_init_arg = arg; |
257 | coro_init_arg = arg; |
122 | |
258 | |
123 | new_coro = ctx; |
259 | new_coro = ctx; |
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133 | nsa.sa_handler = trampoline; |
269 | nsa.sa_handler = trampoline; |
134 | sigemptyset (&nsa.sa_mask); |
270 | sigemptyset (&nsa.sa_mask); |
135 | nsa.sa_flags = SA_ONSTACK; |
271 | nsa.sa_flags = SA_ONSTACK; |
136 | |
272 | |
137 | if (sigaction (SIGUSR2, &nsa, &osa)) |
273 | if (sigaction (SIGUSR2, &nsa, &osa)) |
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274 | { |
138 | perror ("sigaction"); |
275 | perror ("sigaction"); |
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276 | abort (); |
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277 | } |
139 | |
278 | |
140 | /* set the new stack */ |
279 | /* set the new stack */ |
141 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
280 | nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */ |
142 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
281 | nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize); |
143 | nstk.ss_flags = 0; |
282 | nstk.ss_flags = 0; |
144 | |
283 | |
145 | if (sigaltstack (&nstk, &ostk) < 0) |
284 | if (sigaltstack (&nstk, &ostk) < 0) |
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285 | { |
146 | perror ("sigaltstack"); |
286 | perror ("sigaltstack"); |
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287 | abort (); |
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288 | } |
147 | |
289 | |
148 | trampoline_count = 0; |
290 | trampoline_done = 0; |
149 | kill (getpid (), SIGUSR2); |
291 | kill (getpid (), SIGUSR2); |
150 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
292 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
151 | |
293 | |
152 | while (!trampoline_count) |
294 | while (!trampoline_done) |
153 | sigsuspend (&nsig); |
295 | sigsuspend (&nsig); |
154 | |
296 | |
155 | sigaltstack (0, &nstk); |
297 | sigaltstack (0, &nstk); |
156 | nstk.ss_flags = SS_DISABLE; |
298 | nstk.ss_flags = SS_DISABLE; |
157 | if (sigaltstack (&nstk, 0) < 0) |
299 | if (sigaltstack (&nstk, 0) < 0) |
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162 | abort (); |
304 | abort (); |
163 | |
305 | |
164 | if (~ostk.ss_flags & SS_DISABLE) |
306 | if (~ostk.ss_flags & SS_DISABLE) |
165 | sigaltstack (&ostk, 0); |
307 | sigaltstack (&ostk, 0); |
166 | |
308 | |
167 | sigaction (SIGUSR1, &osa, 0); |
309 | sigaction (SIGUSR2, &osa, 0); |
168 | |
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169 | sigprocmask (SIG_SETMASK, &osig, 0); |
310 | sigprocmask (SIG_SETMASK, &osig, 0); |
170 | |
311 | |
171 | # elif CORO_LOSER |
312 | # elif CORO_LOSER |
172 | |
313 | |
173 | setjmp (ctx->env); |
314 | coro_setjmp (ctx->env); |
174 | ctx->env[7] = (long)((char *)sptr + ssize); |
315 | #if __CYGWIN__ && __i386 |
175 | ctx->env[8] = (long)coro_init; |
316 | ctx->env[8] = (long) coro_init; |
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317 | ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long); |
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318 | #elif __CYGWIN__ && __x86_64 |
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319 | ctx->env[7] = (long) coro_init; |
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320 | ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long); |
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321 | #elif defined __MINGW32__ |
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322 | ctx->env[5] = (long) coro_init; |
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323 | ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long); |
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324 | #elif defined _M_IX86 |
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325 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init; |
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326 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
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327 | #elif defined _M_AMD64 |
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328 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init; |
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329 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
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330 | #elif defined _M_IA64 |
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331 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init; |
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332 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
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333 | #else |
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334 | #error "microsoft libc or architecture not supported" |
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335 | #endif |
176 | |
336 | |
177 | # elif CORO_LINUX |
337 | # elif CORO_LINUX |
178 | |
338 | |
179 | setjmp (ctx->env); |
339 | coro_setjmp (ctx->env); |
180 | #if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ |
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181 | && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP) |
340 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
182 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
341 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
183 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr,ssize); |
342 | ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
184 | #elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ |
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185 | && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__) |
343 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
186 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
344 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
187 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
345 | ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long); |
188 | #elif defined(__GNU_LIBRARY__) && defined(__i386__) |
346 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
189 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
347 | ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init; |
190 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
348 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
191 | #elif defined(__GNU_LIBRARY__) && defined(__amd64__) |
349 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
192 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
350 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
193 | ctx->env[0].__jmpbuf[JB_RSP] = (long)((char *)sptr + ssize); |
351 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
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352 | #else |
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353 | #error "linux libc or architecture not supported" |
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354 | #endif |
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355 | |
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356 | # elif CORO_IRIX |
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357 | |
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358 | coro_setjmp (ctx->env, 0); |
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359 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
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360 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
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361 | |
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362 | # elif CORO_ASM |
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363 | |
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364 | ctx->sp = (void **)(ssize + (char *)sptr); |
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365 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
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366 | *--ctx->sp = (void *)coro_init; |
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367 | |
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368 | #if CORO_WIN_TIB |
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369 | *--ctx->sp = 0; /* ExceptionList */ |
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370 | *--ctx->sp = (char *)sptr + ssize; /* StackBase */ |
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371 | *--ctx->sp = sptr; /* StackLimit */ |
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372 | #endif |
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373 | |
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374 | ctx->sp -= NUM_SAVED; |
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375 | memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED); |
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376 | |
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377 | # elif CORO_UCONTEXT |
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378 | |
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379 | getcontext (&(ctx->uc)); |
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380 | |
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381 | ctx->uc.uc_link = 0; |
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382 | ctx->uc.uc_stack.ss_sp = sptr; |
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383 | ctx->uc.uc_stack.ss_size = (size_t)ssize; |
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384 | ctx->uc.uc_stack.ss_flags = 0; |
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385 | |
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386 | makecontext (&(ctx->uc), (void (*)())coro_init, 0); |
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387 | |
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388 | # endif |
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389 | |
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390 | coro_transfer (create_coro, new_coro); |
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391 | } |
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392 | |
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393 | /*****************************************************************************/ |
|
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394 | /* pthread backend */ |
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395 | /*****************************************************************************/ |
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396 | #elif CORO_PTHREAD |
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397 | |
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398 | /* this mutex will be locked by the running coroutine */ |
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399 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
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400 | |
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401 | struct coro_init_args |
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402 | { |
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403 | coro_func func; |
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404 | void *arg; |
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405 | coro_context *self, *main; |
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406 | }; |
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407 | |
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|
408 | static pthread_t null_tid; |
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409 | |
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410 | /* I'd so love to cast pthread_mutex_unlock to void (*)(void *)... */ |
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411 | static void |
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412 | mutex_unlock_wrapper (void *arg) |
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413 | { |
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414 | pthread_mutex_unlock ((pthread_mutex_t *)arg); |
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415 | } |
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416 | |
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417 | static void * |
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418 | coro_init (void *args_) |
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419 | { |
|
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420 | struct coro_init_args *args = (struct coro_init_args *)args_; |
|
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421 | coro_func func = args->func; |
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422 | void *arg = args->arg; |
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423 | |
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424 | pthread_mutex_lock (&coro_mutex); |
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425 | |
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426 | /* we try to be good citizens and use deferred cancellation and cleanup handlers */ |
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427 | pthread_cleanup_push (mutex_unlock_wrapper, &coro_mutex); |
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428 | coro_transfer (args->self, args->main); |
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429 | func (arg); |
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430 | pthread_cleanup_pop (1); |
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431 | |
|
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432 | return 0; |
|
|
433 | } |
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434 | |
|
|
435 | void |
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436 | coro_transfer (coro_context *prev, coro_context *next) |
|
|
437 | { |
|
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438 | pthread_cond_signal (&next->cv); |
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439 | pthread_cond_wait (&prev->cv, &coro_mutex); |
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440 | #if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */ |
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441 | pthread_testcancel (); |
|
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442 | #endif |
|
|
443 | } |
|
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444 | |
|
|
445 | void |
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|
446 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
|
|
447 | { |
|
|
448 | static coro_context nctx; |
|
|
449 | static int once; |
|
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450 | |
|
|
451 | if (!once) |
|
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452 | { |
|
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453 | once = 1; |
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454 | |
|
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455 | pthread_mutex_lock (&coro_mutex); |
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456 | pthread_cond_init (&nctx.cv, 0); |
|
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457 | null_tid = pthread_self (); |
|
|
458 | } |
|
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459 | |
|
|
460 | pthread_cond_init (&ctx->cv, 0); |
|
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461 | |
|
|
462 | if (coro) |
|
|
463 | { |
|
|
464 | pthread_attr_t attr; |
|
|
465 | struct coro_init_args args; |
|
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466 | |
|
|
467 | args.func = coro; |
|
|
468 | args.arg = arg; |
|
|
469 | args.self = ctx; |
|
|
470 | args.main = &nctx; |
|
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471 | |
|
|
472 | pthread_attr_init (&attr); |
|
|
473 | #if __UCLIBC__ |
|
|
474 | /* exists, but is borked */ |
|
|
475 | /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/ |
|
|
476 | #elif __CYGWIN__ |
|
|
477 | /* POSIX, not here */ |
|
|
478 | pthread_attr_setstacksize (&attr, (size_t)ssize); |
194 | #else |
479 | #else |
195 | #error "linux libc or architecture not supported" |
480 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
196 | #endif |
481 | #endif |
|
|
482 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
|
|
483 | pthread_create (&ctx->id, &attr, coro_init, &args); |
197 | |
484 | |
|
|
485 | coro_transfer (args.main, args.self); |
|
|
486 | } |
|
|
487 | else |
|
|
488 | ctx->id = null_tid; |
|
|
489 | } |
|
|
490 | |
|
|
491 | void |
|
|
492 | coro_destroy (coro_context *ctx) |
|
|
493 | { |
|
|
494 | if (!pthread_equal (ctx->id, null_tid)) |
|
|
495 | { |
|
|
496 | pthread_cancel (ctx->id); |
|
|
497 | pthread_mutex_unlock (&coro_mutex); |
|
|
498 | pthread_join (ctx->id, 0); |
|
|
499 | pthread_mutex_lock (&coro_mutex); |
|
|
500 | } |
|
|
501 | |
|
|
502 | pthread_cond_destroy (&ctx->cv); |
|
|
503 | } |
|
|
504 | |
|
|
505 | /*****************************************************************************/ |
|
|
506 | /* fiber backend */ |
|
|
507 | /*****************************************************************************/ |
198 | # elif CORO_IRIX |
508 | #elif CORO_FIBER |
199 | |
509 | |
200 | setjmp (ctx->env); |
510 | #define WIN32_LEAN_AND_MEAN |
201 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
511 | #include <windows.h> |
202 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr,ssize); |
|
|
203 | |
512 | |
204 | # endif |
513 | #include <stdio.h>//D |
|
|
514 | VOID CALLBACK |
|
|
515 | coro_init (PVOID arg) |
|
|
516 | { |
|
|
517 | coro_context *ctx = (coro_context *)arg; |
205 | |
518 | |
|
|
519 | ctx->coro (ctx->arg); |
|
|
520 | } |
|
|
521 | |
|
|
522 | void |
206 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
523 | coro_transfer (coro_context *prev, coro_context *next) |
|
|
524 | { |
|
|
525 | if (!prev->fiber) |
|
|
526 | { |
|
|
527 | prev->fiber = GetCurrentFiber (); |
|
|
528 | |
|
|
529 | if (prev->fiber == 0 || prev->fiber == (void *)0x1e00) |
|
|
530 | prev->fiber = ConvertThreadToFiber (0); |
|
|
531 | } |
|
|
532 | |
|
|
533 | SwitchToFiber (next->fiber); |
|
|
534 | } |
|
|
535 | |
|
|
536 | void |
|
|
537 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
|
|
538 | { |
|
|
539 | ctx->fiber = 0; |
|
|
540 | ctx->coro = coro; |
|
|
541 | ctx->arg = arg; |
|
|
542 | |
|
|
543 | if (!coro) |
|
|
544 | return; |
|
|
545 | |
|
|
546 | ctx->fiber = CreateFiber (ssize, coro_init, ctx); |
|
|
547 | } |
|
|
548 | |
|
|
549 | void |
|
|
550 | coro_destroy (coro_context *ctx) |
|
|
551 | { |
|
|
552 | DeleteFiber (ctx->fiber); |
|
|
553 | } |
207 | |
554 | |
208 | #else |
555 | #else |
209 | error unsupported architecture |
556 | # error unsupported backend |
210 | #endif |
557 | #endif |
211 | } |
|
|
212 | |
558 | |