我正在尝试解决此分段错误错误，但我不明白。在我buffer.c的方法中它抛出了一个分段错误错误deposit()，我有评论表明我认为它发生在哪里。下面的代码
缓冲区.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "buffer.h"
#include "st.h"
#include "semaphore.h"
void c_deposit(buffer *buffer, char c);
int c_remove(buffer *buffer);
buffer *init_buffer(int size);
buffer *init_buffer(int size)
{
buffer *new_Buffer;
new_Buffer=malloc((sizeof(buffer)));
semaphore *sem;
sem=malloc(sizeof(semaphore));
new_Buffer->emptyBuffer=sem;
createSem(new_Buffer->emptyBuffer, size);
semaphore *sem2;
sem2=malloc(sizeof(semaphore));
new_Buffer->fullBuffer=sem2;
createSem(new_Buffer->fullBuffer, 0);
char *array;
array=malloc(sizeof(char)*size);
new_Buffer->chars=array;
new_Buffer->size=size;
new_Buffer->nextIn=0;
new_Buffer->nextOut=0;
return new_Buffer;
}
void c_deposit(buffer *buffer, char c)
{
down(buffer->emptyBuffer);
printf("we're before assigning a char to chars, here's buffer->nextIn: %d\n",buffer->nextIn);
//nextIn will print here
buffer->chars[buffer->nextIn]=c;
//"c" is also not being assigned to chars
printf("buffer size is equal to: %d\n", buffer->size);
printf("nextIn is: %d",buffer->nextIn);
//^line above is never reached. I'm assuming it's faulting on nextIn
buffer->nextIn=(buffer->nextIn+1)%(buffer->size);
printf("we're right before up()");
up(buffer->fullBuffer);
printf("we made it to the end\n");
}
int c_remove(buffer *buffer)
{
int c;
down(buffer->fullBuffer);
c=buffer->chars[buffer->nextOut];
buffer->nextOut=(buffer->nextOut+1)%buffer->size;
up(buffer->emptyBuffer);
return c;
}
这也是我的 main.c
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "st.h"
#include "buffer.h"
#include "semaphore.h"
#define MAX_CHARS 81
#define BUFF_SIZE 12
#define NULL_CHAR
typedef struct {
}ThreadInit;
static buffer *buffer1;
static buffer *buffer2;
static buffer *buffer3;
void *Thread1();
void *Thread2();
void *Thread3();
void *Thread4();
int main(int argc, char const *argv[])
{
buffer1=init_buffer(BUFF_SIZE);
buffer2=init_buffer(BUFF_SIZE);
buffer3=init_buffer(BUFF_SIZE);
if (st_thread_create(Thread1(), NULL, 0, 0) == NULL) {
perror("st_thread_create failed for thread 1");
exit(EXIT_FAILURE);
}
if (st_thread_create(Thread2(), NULL, 0, 0) == NULL) {
perror("st_thread_create failed for thread 2");
exit(EXIT_FAILURE);
}
if (st_thread_create(Thread3(), NULL, 0, 0) == NULL) {
perror("st_thread_create failed for thread 3");
exit(EXIT_FAILURE);
}
if (st_thread_create(Thread4(), NULL, 0, 0) == NULL) {
perror("st_thread_create failed for thread 4");
exit(EXIT_FAILURE);
}
return 0;
}
void *Thread1()
{
int c;
while (1)
{
c=fgetc(stdin);
printf("We got a character from the the input, it's %c\n",c);
c_deposit(buffer1,c);
printf("We deposited a char\n");
if(c==EOF)
{
break;
}
}
st_thread_exit(NULL);
return NULL;
}
void *Thread2(void *state)
{
printf("We made it to Thread2\n");
int c;
while(1)
{
c=c_remove(buffer1);
if(c==EOF)
{
break;
}
if(c=='\n')
{
c=' ';
}
c_deposit(buffer2,c);
}
st_thread_exit(NULL);
return NULL;
}
void *Thread3(void *state)
{
int c;
while(1)
{
c=c_remove(buffer2);
if(c==EOF)
{
break;
}
if(c=='*' && c_remove(buffer2)=='*')
{
c_remove(buffer2);
c='^';
c_deposit(buffer3,c);
}
else
{
c_deposit(buffer3,c);
}
}
st_thread_exit(NULL);
return NULL;
}
void *Thread4(void *state)
{
int counter=0;
int c;
char output[MAX_CHARS];
output[MAX_CHARS-1]='\0';
while(1)
{
c=c_remove(buffer3);
if(c==EOF)
{
break;
}
else
{
output[counter]=c;
if(counter==80)
{
printf("%s\n",output);
counter=-1;
memset(output,'\0',BUFF_SIZE);
}
counter++;
}
}
st_thread_exit(NULL);
return NULL;
}