Mercurial > hg > Members > kaito > longjump
view struct_longjump.c @ 6:509523ee1e27
add struct_longjump.c
author | Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> |
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date | Sun, 24 Nov 2013 01:10:16 +0900 |
parents | |
children | c49bf9e28ea8 |
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#include <stdio.h> #include <setjmp.h> struct CbC_env { void *ret_p,*env; }; __code code1(int n,__code(*__return)(int,void *),void *__environment){ printf("code1 : code entry1\n"); goto __return(n,__environment); } __code return1 (int n,void* env){ printf("return1 : __return entry\n"); *(int*)((struct CbC_env *)(env))->ret_p = n; longjmp(*(jmp_buf*)(((struct CbC_env *)env)->env),1); } int main1 (){ __code (*__return)(); struct CbC_env __environment; jmp_buf j_buf; int retval; __environment.ret_p = &retval; __environment.env = &j_buf; printf("main1 : main1 entry\n"); if (setjmp(__environment.env)){ printf("main1 : main1 return\n"); return *((int *)__environment.ret_p); } __return = return1; goto code1(30,__return,&__environment); return 0; } int main (){ int n; n = main1(); printf("returned\n"); printf("return = %d\n",n); return 1; }