Pthread_create () passing multiple parameters when creating a thread

Because the interface defines only one entry void *arg

int pthread_create (pthread_t *tidp,const pthread_attr_t *attr, (void*) (*START_RTN) (void*), void *arg);

Therefore, if you want to pass parameters, you need to encapsulate the structure and pass multiple parameters to the thread through a struct.

typedef struct{    FUNCPTR entry;/* Function entry *    /void *arg[10];/* parameter */}func;void *start (void *arg) {    FUNC *func = NULL ;    (* (Func->entry)) (Func->arg[0], func->arg[1], func->arg[2], func->arg[3], func->arg[4],            func->arg[5], func- >ARG[6], func->arg[7], func->arg[8], func->arg[9]);    return NULL;} int pthread_ctreate (pthread_t *tidp,const pthread_attr_t *attr, void * (*FUNCPTR) (void *, void *, void *), unsigned args,. ..) {/    * struct Body of constructor collection */    FUNC function = {0};    Function.entry = funcptr;    for (i = 0; i < args; i++)    {        Func->arg[i] = Arg[i];    }     Set thread properties (slightly)    pthread_create (NULL, &attr, start, (void *) &function);    

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Pthread_create () pass in more than one parameter when creating a thread