shmem.c File Reference

#include <kernel/ipc/shmem.h>
#include <kernel/fs/ctl.h>
#include <kernel/fs/sysfs.h>
#include <kernel/fs/vfs.h>
#include <kernel/log/panic.h>
#include <kernel/mem/pmm.h>
#include <kernel/mem/vmm.h>
#include <kernel/proc/process.h>
#include <errno.h>
#include <stdatomic.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/list.h>

Go to the source code of this file.

Functions
static void	shmem_object_free (shmem_object_t *shmem)
static shmem_object_t *	shmem_object_new (void)
static void	shmem_vmm_callback (void *private)
static void *	shmem_object_allocate_pages (shmem_object_t *shmem, uint64_t pageAmount, space_t *space, void *address, pml_flags_t flags)
static uint64_t	shmem_open (file_t *file)
static void	shmem_close (file_t *file)
static void *	shmem_mmap (file_t *file, void *address, uint64_t length, uint64_t *offset, pml_flags_t flags)
void	shmem_init (void)
	Initializes the shared memory subsystem.

Variables
static dentry_t *	shmemDir = NULL
static dentry_t *	newFile = NULL
static file_ops_t	fileOps

Function Documentation

shmem_close()

static void shmem_close ( file_t *  file )

static

Definition at line 124 of file shmem.c.

References DEREF, file, NULL, and dentry_t::private.

shmem_mmap()

static void * shmem_mmap ( file_t *  file, void *  address, uint64_t  length, uint64_t *  offset, pml_flags_t  flags  )

static

Definition at line 135 of file shmem.c.

References address, assert, BYTES_TO_PAGES, EINVAL, errno, file, shmem_object_t::lock, LOCK_SCOPE, MIN, NULL, PAGE_SIZE, shmem_object_t::pageAmount, pageAmount, shmem_object_t::pages, dentry_t::private, REF, sched_process_unsafe(), shmem_object_allocate_pages(), shmem_vmm_callback(), process_t::space, and vmm_map_pages().

shmem_object_allocate_pages()

static void * shmem_object_allocate_pages ( shmem_object_t *  shmem, uint64_t  pageAmount, space_t *  space, void *  address, pml_flags_t  flags  )

static

Definition at line 67 of file shmem.c.

References address, free(), malloc(), NULL, shmem_object_t::pageAmount, pageAmount, shmem_object_t::pages, pmm_alloc(), pmm_free(), REF, shmem_vmm_callback(), and vmm_map_pages().

Referenced by shmem_mmap().

shmem_object_free()

static void shmem_object_free ( shmem_object_t *  shmem )

static

Definition at line 21 of file shmem.c.

References assert, free(), NULL, shmem_object_t::pageAmount, shmem_object_t::pages, and pmm_free().

Referenced by shmem_object_new().

shmem_object_new()

static shmem_object_t * shmem_object_new ( void  )

static

Definition at line 41 of file shmem.c.

References shmem_object_t::lock, lock_init(), malloc(), NULL, shmem_object_t::pageAmount, shmem_object_t::pages, shmem_object_t::ref, ref_init(), and shmem_object_free().

Referenced by shmem_open().

shmem_open()

static uint64_t shmem_open ( file_t *  file )

static

Definition at line 112 of file shmem.c.

References ERR, file, NULL, dentry_t::private, and shmem_object_new().

shmem_vmm_callback()

static void shmem_vmm_callback ( void *  private )

static

Definition at line 56 of file shmem.c.

References DEREF, and NULL.

Referenced by shmem_mmap(), and shmem_object_allocate_pages().

Variable Documentation

fileOps

file_ops_t fileOps

static

Initial value:

= {
    .open = shmem_open,
    .close = shmem_close,
    .mmap = shmem_mmap,
}

Definition at line 190 of file shmem.c.

Referenced by shmem_init().

newFile

dentry_t* newFile = NULL

static

Definition at line 19 of file shmem.c.

Referenced by shmem_init().

shmemDir

dentry_t* shmemDir = NULL

static

Definition at line 18 of file shmem.c.

Referenced by shmem_init().