docker-shm.c File Reference

This has the contents of creating and using Shared Memory. More...

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/sem.h>
#include <fcntl.h>
#include <trace_replay.h>
#include <log.h>
#include <driver/docker-driver.h>

Include dependency graph for docker-shm.c:

Functions
static int	__docker_sem_init (struct docker_info *info)
	Initialize the Semaphore. More...
static int	__docker_shm_init (struct docker_info *info)
	Initialize the Shared Memory. More...
static void	docker_sem_wait (const struct docker_info *info)
	Acquire the semaphore lock. More...
static void	docker_sem_post (const struct docker_info *info)
	Release the semaphore lock. More...
int	docker_shm_init (struct docker_info *info)
	Do the __docker_shm_init() and __docker_sem_init() More...
int	docker_shm_get (const struct docker_info *info, void *buffer)
	Retrieve the data from Shared Memory. More...
void	docker_shm_free (struct docker_info *info, int flags)
	Deallocate the Shared Memory resources. More...

Detailed Description

This has the contents of creating and using Shared Memory.

Copyright

"Container Tracer" which executes the container performance mesurements Copyright (C) 2020 SuhoSon

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

Author

SuhoSon (ngeol.nosp@m.564@.nosp@m.gmail.nosp@m..com)

Version

0.1

Date

2020-08-19

Function Documentation

__docker_sem_init()

static int __docker_sem_init ( struct docker_info *  info )

static

Initialize the Semaphore.

Parameters

[in]

info

docker_info structure which wants to init.

Returns

SemaphoreID for success to init, negative value for fail to init.

__docker_shm_init()

static int __docker_shm_init ( struct docker_info *  info )

static

Initialize the Shared Memory.

Parameters

[in]

info

docker_info structure which wants to init.

Returns

Shared MemoryID for success to init, negative value for fail to init.

docker_sem_post()

static void docker_sem_post ( const struct docker_info *  info )

static

Release the semaphore lock.

Parameters

[in]

info

This is an information pointer that wants to release the semaphore.

docker_sem_wait()

static void docker_sem_wait ( const struct docker_info *  info )

static

Acquire the semaphore lock.

Parameters

[in]

info

This is an information pointer that wants to acquire the semaphore.

docker_shm_free()

void docker_shm_free	(	struct docker_info *	info,
		int	flags
	)

Deallocate the Shared Memory resources.

Parameters

[in]	info	docker_info structure which wants to deallocate.
[in]	flags	Set a range of deallocation.

docker_shm_get()

int docker_shm_get	(	const struct docker_info *	info,
		void *	buffer
	)

Retrieve the data from Shared Memory.

Parameters

[in]	info	docker_info structure which wants to get data.
[out]	buffer	Destination of data will be stored

Returns

0 for success to init, negative value for fail to init.

Here is the call graph for this function:

docker_shm_init()

int docker_shm_init

(

struct docker_info *

info

)

Do the __docker_shm_init() and __docker_sem_init()

Parameters

[in]

info

docker_info structure which wants to init.

Returns

0 for success to init, negative value for fail to init.

Here is the call graph for this function: