BLI_mmap.cc File Reference

#include "BLI_mmap.h"
#include "BLI_fileops.h"
#include "BLI_listbase.h"
#include "MEM_guardedalloc.h"
#include <cstring>
#include <csignal>
#include <cstdlib>
#include <sys/mman.h>
#include <unistd.h>

Go to the source code of this file.

Classes
struct	BLI_mmap_file
struct	error_handler_data

Functions
static void	sigbus_handler (int sig, siginfo_t *siginfo, void *ptr)
static bool	sigbus_handler_setup ()
static void	sigbus_handler_add (BLI_mmap_file *file)
static void	sigbus_handler_remove (BLI_mmap_file *file)
BLI_mmap_file *	BLI_mmap_open (int fd)
bool	BLI_mmap_read (BLI_mmap_file *file, void *dest, size_t offset, size_t length)
void *	BLI_mmap_get_pointer (BLI_mmap_file *file)
size_t	BLI_mmap_get_length (const BLI_mmap_file *file)
bool	BLI_mmap_any_io_error (const BLI_mmap_file *file)
void	BLI_mmap_free (BLI_mmap_file *file)

Variables
static struct error_handler_data	error_handler = {{nullptr}}

Function Documentation

BLI_mmap_any_io_error()

bool BLI_mmap_any_io_error

(

const BLI_mmap_file *

file

)

Definition at line 222 of file BLI_mmap.cc.

References BLI_mmap_file::io_error.

Referenced by IMB_load_image_from_file_descriptor().

BLI_mmap_free()

void BLI_mmap_free

(

BLI_mmap_file *

file

)

Definition at line 227 of file BLI_mmap.cc.

References BLI_mmap_file::handle, BLI_mmap_file::length, MEM_freeN(), BLI_mmap_file::memory, and sigbus_handler_remove().

Referenced by imb_load_filepath_thumbnail_webp(), IMB_load_image_from_file_descriptor(), memory_close_mmap(), and IMMapStream::~IMMapStream().

BLI_mmap_get_length()

size_t BLI_mmap_get_length

(

const BLI_mmap_file *

file

)

Definition at line 217 of file BLI_mmap.cc.

References BLI_mmap_file::length.

Referenced by BLI_filereader_new_mmap(), imb_load_filepath_thumbnail_webp(), IMB_load_image_from_file_descriptor(), and IMMapStream::IMMapStream().

BLI_mmap_get_pointer()

void * BLI_mmap_get_pointer

(

BLI_mmap_file *

file

)

Definition at line 212 of file BLI_mmap.cc.

References BLI_mmap_file::memory.

Referenced by imb_load_filepath_thumbnail_webp(), IMB_load_image_from_file_descriptor(), and IMMapStream::IMMapStream().

BLI_mmap_open()

BLI_mmap_file * BLI_mmap_open

(

int

fd

)

Definition at line 133 of file BLI_mmap.cc.

References BLI_lseek(), BLI_mmap_file::handle, BLI_mmap_file::length, length(), MEM_callocN(), BLI_mmap_file::memory, sigbus_handler_add(), sigbus_handler_setup(), and UNLIKELY.

Referenced by BLI_filereader_new_mmap(), imb_load_filepath_thumbnail_webp(), IMB_load_image_from_file_descriptor(), and IMMapStream::IMMapStream().

BLI_mmap_read()

bool BLI_mmap_read	(	BLI_mmap_file *	file,
		void *	dest,
		size_t	offset,
		size_t	length )

Definition at line 183 of file BLI_mmap.cc.

References BLI_mmap_file::io_error, BLI_mmap_file::length, length(), and BLI_mmap_file::memory.

Referenced by memory_read_mmap().

sigbus_handler()

void sigbus_handler ( int sig, siginfo_t * siginfo, void * ptr )

static

Definition at line 61 of file BLI_mmap.cc.

References BLI_assert, error_handler, BLI_mmap_file::io_error, BLI_mmap_file::length, LISTBASE_FOREACH, BLI_mmap_file::memory, and ptr.

Referenced by sigbus_handler_setup().

sigbus_handler_add()

void sigbus_handler_add ( BLI_mmap_file * file )

static

Definition at line 119 of file BLI_mmap.cc.

References BLI_addtail(), BLI_genericNodeN(), and error_handler.

Referenced by BLI_mmap_open().

sigbus_handler_remove()

void sigbus_handler_remove ( BLI_mmap_file * file )

static

Definition at line 125 of file BLI_mmap.cc.

References BLI_findptr(), BLI_freelinkN(), data, error_handler, and offsetof.

Referenced by BLI_mmap_free().

sigbus_handler_setup()

bool sigbus_handler_setup ( )

static

Definition at line 97 of file BLI_mmap.cc.

References error_handler, and sigbus_handler().

Referenced by BLI_mmap_open().

Variable Documentation

error_handler

struct error_handler_data error_handler = {{nullptr}}

static

Referenced by sigbus_handler(), sigbus_handler_add(), sigbus_handler_remove(), and sigbus_handler_setup().