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view pointer_longjump.c @ 4:d75a89b10176
write pointer_longjump.c
author | Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> |
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date | Thu, 14 Nov 2013 13:16:46 +0900 |
parents | e6aa3b678e4a |
children | 4e7858590985 |
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#include <stdio.h> #include <setjmp.h> #include <stdlib.h> __code code1(int n,__code(*__return)(int,void *,int *),void *__environment,int *__ret_p){ printf("code1 : code entry1\n"); goto __return(n,__environment,__ret_p); } __code return1 (int n,void* env,int* __ret_p){ printf("return1 : __return entry\n"); *__ret_p = n; longjmp(*(jmp_buf*)env,1); } int main1 (){ __code (*__return)(); void *__environment; int retval; int *__ret_p; __ret_p = &retval; printf("main1 : main1 entry\n"); __environment = (void*)malloc(sizeof(jmp_buf)); if (setjmp(__environment)){ free(__environment); printf("main1 : main1 return\n"); return retval; } __return = return1; goto code1(30,__return,__environment,__ret_p); return 0; } int main (){ int n; n = main1(); printf("returned\n"); printf("return = %d\n",n); return 1; }