posix_ioutils.c File Reference

#include <sys/select.h>
#include <unistd.h>
#include <assert.h>
#include <hipc/posix/ioutils.h>

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Functions
int	hipcPosixReadReady (int fd)
	Check a file descriptor is ready to read by using select(2) and returns the result of select(2). More...
ssize_t	hipcPosixReadExactly (const int fd, void *buf, const size_t count)
	Read count bytes from fd by using read(2). More...
ssize_t	hipcPosixWriteExactly (const int fd, void const *buf, const size_t count)
	Writes count bytes to fd by using write(2). More...

Function Documentation

int hipcPosixReadReady

(

int

fd

)

Check a file descriptor is ready to read by using select(2) and returns the result of select(2).

Parameters

fd	file descriptor

Return values

1	fd is at the ready.
0	fd is not at the ready.
-1	means occurrence of an error.

Definition at line 17 of file posix_ioutils.c.

ssize_t hipcPosixReadExactly	(	const int	fd,
		void *	buf,
		const size_t	count
	)

Read count bytes from fd by using read(2).

count must be less than or equal to SSIZE_MAX, otherwise the result is unspecified.

Parameters

fd	File descriptor
buf	Buffer into which the bytes are read
count	Number of the bytes to be read.

Return values

>0	The number of the bytes that have been read
0	The fd is at the end of the file or count is 0.
-1	means occurrence of an error, and errno is set by read(2).

Definition at line 41 of file posix_ioutils.c.

Referenced by hipcPosixReadMsg(), and hipcUsocRead().

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ssize_t hipcPosixWriteExactly	(	const int	fd,
		void const *	buf,
		const size_t	count
	)

Writes count bytes to fd by using write(2).

count must be less than or equal to SSIZE_MAX, otherwise the result is unspecified.

Parameters

fd	File descriptor
buf	Buffer from which bytes are written
count	Number of bytes to be written.

Return values

>=0	Number of bytes that have been written
-1	means occurrence of an error, and errno is set by write(2).

Definition at line 71 of file posix_ioutils.c.

Referenced by hipcPosixWriteMsg(), and hipcUsocWrite().

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