在我的一个文件中（我被告知我不允许修改）我不断收到以下错误：
In file included from buffer.h:1,
from buffer.c:4:
semaphore.h:4: error: expected specifier-qualifier-list before ‘st_cond_t’
当我将库添加st.h到其中时，它可以编译并运行良好，但我被告知我不允许修改此文件，因此我必须找到解决方法，但我不确定如何。有什么建议么？我将在下面发布相关代码。
semaphore.h: 不允许编辑这个文件
typedef struct
{
int value;
st_cond_t sem_queue;
} semaphore;
void down(semaphore *s);
void up(semaphore *s);
void createSem(semaphore *s, int value);
buffer.h
#include "semaphore.h"
#include "st.h"
#pragma once //necessary to avoid compiler errors
/*this file just defines the structure of a buffer and the methods that will be associated with it. Not too complex */
typedef struct
{
semaphore *emptyBuffer; //need two semaphores according to slides
semaphore *fullBuffer;
int nextIn;
int nextOut;
int size;
char *chars; //literall buffer object
}buffer;
void c_deposit(buffer *buffer, int c); //declaring our functions, similar to an interface in java
int c_remove(buffer *buffer);
buffer *init_buffer(int size);
buffer.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "buffer.h"
#include "st.h"
/* This file fleshes out the methods declared in the header. c_deposit/c_remove are identical in logic to the slides for this assignment, they follow the basic consumer/producer dynamic. init_buffer initializes and provides memory for the elements associated with a buffer struct so that we can access them later */
//prototypes
void c_deposit(buffer *buffer, int c);
int c_remove(buffer *buffer);
buffer *init_buffer(int size);
void c_deposit(buffer *buffer, int c) //code pretty much taken from slides
{
down(buffer->emptyBuffer); //called down semaphore
buffer->chars[buffer->nextIn]=c; //put char on char buffer
buffer->nextIn=(buffer->nextIn+1)%buffer->size; //increment counter
up(buffer->fullBuffer); //call up semaphore
}
int c_remove(buffer *buffer) //almost identical to deposit
{
int c;
down(buffer->fullBuffer);
c=buffer->chars[buffer->nextOut]; //pull off char
buffer->nextOut=(buffer->nextOut+1)%buffer->size; //increment
up(buffer->emptyBuffer);
return c; //return char
}
buffer *init_buffer(int size) //initializing components of our buffer
{
//want to malloc so that we don't lose it when we return
buffer *new_Buffer;
new_Buffer=malloc((sizeof(buffer)));
semaphore *sem; //malloc a semaphore and then set the buffer empty/full semaphores equal to it so don't lose it
sem=malloc(sizeof(semaphore));
new_Buffer->emptyBuffer=sem; //same as last comment
createSem(new_Buffer->emptyBuffer, size); //have to create the semaphore
semaphore *sem2;
sem2=malloc(sizeof(semaphore));
new_Buffer->fullBuffer=sem2;
createSem(new_Buffer->fullBuffer, 0);
char *array; //malloc for the char buffer
array=malloc(sizeof(char)*size);
new_Buffer->chars=array;
new_Buffer->size=size;
int nextIn=0; //initialize the basic ints
new_Buffer->nextIn=nextIn;
int nextOut=0;
new_Buffer->nextOut=nextOut;
return new_Buffer;
}
main.c：只是要包括#include部分以供参考
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "st.h"
#include "buffer.h"