xv6/pipe.c File Reference

#include "types.h"
#include "defs.h"
#include "param.h"
#include "mmu.h"
#include "proc.h"
#include "fs.h"
#include "file.h"
#include "spinlock.h"

Go to the source code of this file.

Data Structures
struct	pipe
Defines
#define	PIPESIZE   512
Functions
int	pipealloc (struct file **f0, struct file **f1)
void	pipeclose (struct pipe *p, int writable)
int	pipewrite (struct pipe *p, char *addr, int n)
int	piperead (struct pipe *p, char *addr, int n)

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Define Documentation

#define PIPESIZE   512

Definition at line 10 of file pipe.c.

Referenced by piperead(), and pipewrite().

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Function Documentation

int pipealloc	(	struct file **	f0,
		struct file **	f1
	)

Definition at line 22 of file pipe.c.

References filealloc(), fileclose(), initlock(), kalloc(), kfree(), pipe::lock, pipe::nread, pipe::nwrite, PAGE, pipe::readopen, and pipe::writeopen.

Referenced by sys_pipe().

void pipeclose	(	struct pipe *	p,
		int	writable
	)

Definition at line 58 of file pipe.c.

References acquire(), kfree(), pipe::lock, pipe::nread, pipe::nwrite, PAGE, pipe::readopen, release(), wakeup(), and pipe::writeopen.

Referenced by fileclose().

int piperead	(	struct pipe *	p,
		char *	addr,
		int	n
	)

Definition at line 98 of file pipe.c.

References acquire(), pipe::data, pipe::lock, pipe::nread, pipe::nwrite, PIPESIZE, release(), sleep(), wakeup(), and pipe::writeopen.

Referenced by fileread().

int pipewrite	(	struct pipe *	p,
		char *	addr,
		int	n
	)

Definition at line 76 of file pipe.c.

References acquire(), pipe::data, pipe::lock, pipe::nread, pipe::nwrite, PIPESIZE, pipe::readopen, release(), sleep(), and wakeup().

Referenced by filewrite().