lf_semaphore.c File Reference

#include "lf_semaphore.h"
#include <assert.h>
#include "util.h"

Functions
lf_semaphore_t *	lf_semaphore_new (size_t count)
	Create a new semaphore.
void	lf_semaphore_release (lf_semaphore_t *semaphore, size_t i)
	Release the 'semaphore' and add 'i' to its count.
void	lf_semaphore_acquire (lf_semaphore_t *semaphore)
	Acquire the 'semaphore'. Will block if count is 0.
void	lf_semaphore_wait (lf_semaphore_t *semaphore)
	Wait on the 'semaphore' if count is 0.
void	lf_semaphore_destroy (lf_semaphore_t *semaphore)
	Destroy the 'semaphore'.

Function Documentation

lf_semaphore_acquire()

void lf_semaphore_acquire

(

lf_semaphore_t *

semaphore

)

Acquire the 'semaphore'. Will block if count is 0.

Parameters

semaphore

Instance of a semaphore.

lf_semaphore_destroy()

void lf_semaphore_destroy

(

lf_semaphore_t *

semaphore

)

Destroy the 'semaphore'.

Parameters

semaphore

Instance of a semaphore.

lf_semaphore_new()

lf_semaphore_t * lf_semaphore_new

(

size_t

count

)

Create a new semaphore.

Copyright (c) 2021, The University of Texas at Dallas.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Semaphore utility for reactor C.

Author

{Soroush Bateni sorou.nosp@m.sh@u.nosp@m.tdall.nosp@m.as.e.nosp@m.du}

Parameters

count

The count to start with.

Returns

lf_semaphore_t* Can be NULL on error.

lf_semaphore_release()

void lf_semaphore_release	(	lf_semaphore_t *	semaphore,
		size_t	i )

Release the 'semaphore' and add 'i' to its count.

Parameters

semaphore	Instance of a semaphore
i	The count to add.

lf_semaphore_wait()

void lf_semaphore_wait

(

lf_semaphore_t *

semaphore

)

Wait on the 'semaphore' if count is 0.

Parameters

semaphore

Instance of a semaphore.