Created
November 6, 2012 15:58
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Passing a structure to a thread in C
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| /////////////////////////////////////////////___Global___//////////////////////////////////////////// | |
| struct myStruct{ | |
| int a; | |
| int b; | |
| }; | |
| /////////////////////////////////////////////___main Function___//////////////////////////////////////////// | |
| void* thread_arg_v; | |
| int err = 0; | |
| myStruct s1; | |
| myStruct * s1_address; | |
| s1.a = 1; | |
| s1.b = 2; | |
| //thread_arg_v = (void*) thread_arg;//this is not possible may be because size of struct is more than | |
| //size of void pointer | |
| s1_address = &s1; | |
| thread_arg_v = (void *) err;// this is possible and now you have to pass thread_arg_v to pthread_create | |
| if((err = pthread_create(&thread_id, NULL, threadHandler, &s1_address ))!=0) { | |
| perror("Error while creating thread\n"); | |
| } | |
| /////////////////////////////////////////////___threadHandler Function___////////////////////////////////////////// | |
| myStruct * s2; | |
| s2 = (myStruct*) (arg);//arg is parameter of threadHandler |
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| /////////////////////////////////////////////___Global___//////////////////////////////////////////// | |
| struct myStruct{ | |
| int a; | |
| int b; | |
| }; | |
| /////////////////////////////////////////////___main Function___//////////////////////////////////////////// | |
| void* thread_arg_v; | |
| int err = 0; | |
| myStruct s1; | |
| s1.a = 1; | |
| s1.b = 2; | |
| //thread_arg_v = (void*) thread_arg;//this is not possible may be because size of struct is more than | |
| //size of void pointer | |
| thread_arg_v = (void *) err;// this is possible and now you have to pass thread_arg_v to pthread_create | |
| if((err = pthread_create(&thread_id, NULL, threadHandler, &s1 ))!=0) { | |
| perror("Error while creating thread\n"); | |
| } | |
| /////////////////////////////////////////////___threadHandler Function___////////////////////////////////////////// | |
| myStruct s2; | |
| s2 = *( (myStruct*) (arg) );//arg is parameter of threadHandler |
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