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efl/legacy/eina/src/lib/eina_file.c

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/* EINA - EFL data type library
* Copyright (C) 2007-2008 Jorge Luis Zapata Muga, Vincent Torri
* Copyright (C) 2010-2011 Cedric Bail
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library;
* if not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_ALLOCA_H
# include <alloca.h>
#elif defined __GNUC__
# define alloca __builtin_alloca
#elif defined _AIX
# define alloca __alloca
#elif defined _MSC_VER
# include <malloc.h>
# define alloca _alloca
#else
# include <stddef.h>
# ifdef __cplusplus
extern "C"
# endif
void *alloca (size_t);
#endif
#include <string.h>
#include <stddef.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <sys/mman.h>
#include <fcntl.h>
#define PATH_DELIM '/'
#ifdef __sun
# ifndef NAME_MAX
# define NAME_MAX 255
# endif
#endif
#include "eina_config.h"
#include "eina_private.h"
/* undefs EINA_ARG_NONULL() so NULL checks are not compiled out! */
#include "eina_safety_checks.h"
#include "eina_file.h"
#include "eina_stringshare.h"
#include "eina_hash.h"
#include "eina_list.h"
#include "eina_lock.h"
#include "eina_mmap.h"
/*============================================================================*
* Local *
*============================================================================*/
/**
* @cond LOCAL
*/
#ifndef EINA_LOG_COLOR_DEFAULT
#define EINA_LOG_COLOR_DEFAULT EINA_COLOR_CYAN
#endif
#ifdef ERR
#undef ERR
#endif
#define ERR(...) EINA_LOG_DOM_ERR(_eina_file_log_dom, __VA_ARGS__)
#ifdef WRN
#undef WRN
#endif
#define WRN(...) EINA_LOG_DOM_WARN(_eina_file_log_dom, __VA_ARGS__)
#ifdef DBG
#undef DBG
#endif
#define DBG(...) EINA_LOG_DOM_DBG(_eina_file_log_dom, __VA_ARGS__)
#define EINA_SMALL_PAGE 4096
# define EINA_HUGE_PAGE 16 * 1024 * 1024
typedef struct _Eina_File_Iterator Eina_File_Iterator;
typedef struct _Eina_File_Map Eina_File_Map;
struct _Eina_File_Iterator
{
Eina_Iterator iterator;
DIR *dirp;
int length;
char dir[1];
};
struct _Eina_File
{
const char *filename;
Eina_Hash *map;
Eina_Hash *rmap;
void *global_map;
Eina_Lock lock;
unsigned long long length;
time_t mtime;
ino_t inode;
int refcount;
int global_refcount;
int fd;
Eina_Bool shared : 1;
Eina_Bool delete_me : 1;
};
struct _Eina_File_Map
{
void *map;
unsigned long int offset;
unsigned long int length;
int refcount;
};
static Eina_Hash *_eina_file_cache = NULL;
static Eina_Lock _eina_file_lock_cache;
static int _eina_file_log_dom = -1;
/*
* This complex piece of code is needed due to possible race condition.
* The code and description of the issue can be found at :
* http://womble.decadent.org.uk/readdir_r-advisory.html
*/
static size_t
_eina_dirent_buffer_size(DIR *dirp)
{
long name_max;
size_t name_end;
#if defined(HAVE_FPATHCONF) && defined(HAVE_DIRFD) && defined(_PC_NAME_MAX)
name_max = fpathconf(dirfd(dirp), _PC_NAME_MAX);
if (name_max == -1)
{
# if defined(NAME_MAX)
name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
# else
name_max = PATH_MAX;
# endif
}
#else
# if defined(NAME_MAX)
name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
# else
# ifdef _PC_NAME_MAX
# warning "buffer size for readdir_r cannot be determined safely, best effort, but racy"
name_max = pathconf(dirp, _PC_NAME_MAX);
# else
# error "buffer size for readdir_r cannot be determined safely"
# endif
# endif
#endif
name_end = (size_t) offsetof(struct dirent, d_name) + name_max + 1;
return (name_end > sizeof (struct dirent) ? name_end : sizeof (struct dirent));
}
static Eina_Bool
_eina_file_ls_iterator_next(Eina_File_Iterator *it, void **data)
{
struct dirent *dp;
char *name;
size_t length;
dp = alloca(_eina_dirent_buffer_size(it->dirp));
do
{
if (readdir_r(it->dirp, dp, &dp))
return EINA_FALSE;
if (dp == NULL)
return EINA_FALSE;
}
while ((dp->d_name[0] == '.') &&
((dp->d_name[1] == '\0') ||
((dp->d_name[1] == '.') && (dp->d_name[2] == '\0'))));
#ifdef _DIRENT_HAVE_D_NAMLEN
length = dp->d_namlen;
#else
length = strlen(dp->d_name);
#endif
name = alloca(length + 2 + it->length);
memcpy(name, it->dir, it->length);
memcpy(name + it->length, "/", 1);
memcpy(name + it->length + 1, dp->d_name, length + 1);
*data = (char *)eina_stringshare_add(name);
return EINA_TRUE;
}
static DIR *
_eina_file_ls_iterator_container(Eina_File_Iterator *it)
{
return it->dirp;
}
static void
_eina_file_ls_iterator_free(Eina_File_Iterator *it)
{
closedir(it->dirp);
EINA_MAGIC_SET(&it->iterator, 0);
free(it);
}
typedef struct _Eina_File_Direct_Iterator Eina_File_Direct_Iterator;
struct _Eina_File_Direct_Iterator
{
Eina_Iterator iterator;
DIR *dirp;
int length;
Eina_File_Direct_Info info;
char dir[1];
};
static Eina_Bool
_eina_file_direct_ls_iterator_next(Eina_File_Direct_Iterator *it, void **data)
{
struct dirent *dp;
size_t length;
dp = alloca(_eina_dirent_buffer_size(it->dirp));
do
{
if (readdir_r(it->dirp, dp, &dp))
return EINA_FALSE;
if (!dp)
return EINA_FALSE;
#ifdef _DIRENT_HAVE_D_NAMLEN
length = dp->d_namlen;
#else
length = strlen(dp->d_name);
#endif
if (it->info.name_start + length + 1 >= EINA_PATH_MAX)
continue;
}
while ((dp->d_name[0] == '.') &&
((dp->d_name[1] == '\0') ||
((dp->d_name[1] == '.') && (dp->d_name[2] == '\0'))));
memcpy(it->info.path + it->info.name_start, dp->d_name, length);
it->info.name_length = length;
it->info.path_length = it->info.name_start + length;
it->info.path[it->info.path_length] = '\0';
#ifdef _DIRENT_HAVE_D_TYPE
switch (dp->d_type)
{
case DT_FIFO:
it->info.type = EINA_FILE_FIFO;
break;
case DT_CHR:
it->info.type = EINA_FILE_CHR;
break;
case DT_DIR:
it->info.type = EINA_FILE_DIR;
break;
case DT_BLK:
it->info.type = EINA_FILE_BLK;
break;
case DT_REG:
it->info.type = EINA_FILE_REG;
break;
case DT_LNK:
it->info.type = EINA_FILE_LNK;
break;
case DT_SOCK:
it->info.type = EINA_FILE_SOCK;
break;
case DT_WHT:
it->info.type = EINA_FILE_WHT;
break;
default:
it->info.type = EINA_FILE_UNKNOWN;
break;
}
#else
it->info.type = EINA_FILE_UNKNOWN;
#endif
*data = &it->info;
return EINA_TRUE;
}
static DIR *
_eina_file_direct_ls_iterator_container(Eina_File_Direct_Iterator *it)
{
return it->dirp;
}
static void
_eina_file_direct_ls_iterator_free(Eina_File_Direct_Iterator *it)
{
closedir(it->dirp);
EINA_MAGIC_SET(&it->iterator, 0);
free(it);
}
static Eina_Bool
_eina_file_stat_ls_iterator_next(Eina_File_Direct_Iterator *it, void **data)
{
struct stat st;
if (!_eina_file_direct_ls_iterator_next(it, data))
return EINA_FALSE;
if (it->info.type == EINA_FILE_UNKNOWN)
{
#ifdef HAVE_FSTATAT
int fd;
fd = dirfd(it->dirp);
if (fstatat(fd, it->info.path + it->info.name_start, &st, 0))
#else
if (stat(it->info.path, &st))
#endif
it->info.type = EINA_FILE_UNKNOWN;
else
{
if (S_ISREG(st.st_mode))
it->info.type = EINA_FILE_REG;
else if (S_ISDIR(st.st_mode))
it->info.type = EINA_FILE_DIR;
else if (S_ISCHR(st.st_mode))
it->info.type = EINA_FILE_CHR;
else if (S_ISBLK(st.st_mode))
it->info.type = EINA_FILE_BLK;
else if (S_ISFIFO(st.st_mode))
it->info.type = EINA_FILE_FIFO;
else if (S_ISLNK(st.st_mode))
it->info.type = EINA_FILE_LNK;
else if (S_ISSOCK(st.st_mode))
it->info.type = EINA_FILE_SOCK;
else
it->info.type = EINA_FILE_UNKNOWN;
}
}
return EINA_TRUE;
}
static void
_eina_file_real_close(Eina_File *file)
{
if (file->refcount != 0) return;
eina_hash_free(file->rmap);
eina_hash_free(file->map);
if (file->global_map != MAP_FAILED)
munmap(file->global_map, file->length);
close(file->fd);
free(file);
}
static void
_eina_file_map_close(Eina_File_Map *map)
{
munmap(map->map, map->length);
free(map);
}
static unsigned int
_eina_file_map_key_length(const void *key __UNUSED__)
{
return sizeof (unsigned long int) * 2;
}
static int
_eina_file_map_key_cmp(const unsigned long int *key1, int key1_length __UNUSED__,
const unsigned long int *key2, int key2_length __UNUSED__)
{
if (key1[0] - key2[0] == 0) return key1[1] - key2[1];
return key1[0] - key2[0];
}
static int
_eina_file_map_key_hash(const unsigned long int *key, int key_length __UNUSED__)
{
return eina_hash_int64(&key[0], sizeof (unsigned long int))
^ eina_hash_int64(&key[1], sizeof (unsigned long int));
}
#ifndef MAP_POPULATE
static int
_eina_file_map_populate(char *map, unsigned int size)
{
int r = 0xDEADBEEF;
int i;
int s;
#ifdef MAP_HUGETLB
s = size > EINA_HUGE_PAGE ? EINA_HUGE_PAGE : EINA_SMALL_PAGE;
#else
s = EINA_SMALL_PAGE;
#endif
for (i = 0; i < size; i += s)
r ^= map[i];
r ^= map[size];
return r;
}
#endif
static int
_eina_file_map_rule_apply(Eina_File_Populate rule, void *addr, unsigned long int size)
{
int tmp = 42;
int flag = MADV_RANDOM;
switch (rule)
{
case EINA_FILE_RANDOM: flag = MADV_RANDOM; break;
case EINA_FILE_SEQUENTIAL: flag = MADV_SEQUENTIAL; break;
case EINA_FILE_POPULATE: flag = MADV_WILLNEED; break;
case EINA_FILE_WILLNEED: flag = MADV_WILLNEED; break;
}
madvise(addr, size, flag);
#ifndef MAP_POPULATE
if (rule == EINA_FILE_POPULATE)
tmp ^= _eina_file_map_populate(addr, size);
#endif
return tmp;
}
Eina_Bool
eina_file_init(void)
{
_eina_file_log_dom = eina_log_domain_register("eina_file",
EINA_LOG_COLOR_DEFAULT);
if (_eina_file_log_dom < 0)
{
EINA_LOG_ERR("Could not register log domain: eina_file");
return EINA_FALSE;
}
_eina_file_cache = eina_hash_string_djb2_new(EINA_FREE_CB(_eina_file_real_close));
if (!_eina_file_cache)
{
ERR("Could not create cache.");
eina_log_domain_unregister(_eina_file_log_dom);
_eina_file_log_dom = -1;
return EINA_FALSE;
}
eina_lock_new(&_eina_file_lock_cache);
return EINA_TRUE;
}
Eina_Bool
eina_file_shutdown(void)
{
if (eina_hash_population(_eina_file_cache) > 0)
{
Eina_Iterator *it;
const char *key;
it = eina_hash_iterator_key_new(_eina_file_cache);
EINA_ITERATOR_FOREACH(it, key)
ERR("File [%s] still open !", key);
eina_iterator_free(it);
}
eina_hash_free(_eina_file_cache);
eina_lock_free(&_eina_file_lock_cache);
eina_log_domain_unregister(_eina_file_log_dom);
_eina_file_log_dom = -1;
return EINA_TRUE;
}
/**
* @endcond
*/
/*============================================================================*
* Global *
*============================================================================*/
/*============================================================================*
* API *
*============================================================================*/
EAPI Eina_Bool
eina_file_dir_list(const char *dir,
Eina_Bool recursive,
Eina_File_Dir_List_Cb cb,
void *data)
{
Eina_File_Direct_Info *info;
Eina_Iterator *it;
EINA_SAFETY_ON_NULL_RETURN_VAL(cb, EINA_FALSE);
EINA_SAFETY_ON_NULL_RETURN_VAL(dir, EINA_FALSE);
EINA_SAFETY_ON_TRUE_RETURN_VAL(dir[0] == '\0', EINA_FALSE);
it = eina_file_stat_ls(dir);
if (!it)
return EINA_FALSE;
EINA_ITERATOR_FOREACH(it, info)
{
cb(info->path + info->name_start, dir, data);
if (recursive == EINA_TRUE && info->type == EINA_FILE_DIR)
{
eina_file_dir_list(info->path, recursive, cb, data);
}
}
eina_iterator_free(it);
return EINA_TRUE;
}
EAPI Eina_Array *
eina_file_split(char *path)
{
Eina_Array *ea;
char *current;
size_t length;
EINA_SAFETY_ON_NULL_RETURN_VAL(path, NULL);
ea = eina_array_new(16);
if (!ea)
return NULL;
for (current = strchr(path, PATH_DELIM);
current;
path = current + 1, current = strchr(path, PATH_DELIM))
{
length = current - path;
if (length <= 0)
continue;
eina_array_push(ea, path);
*current = '\0';
}
if (*path != '\0')
eina_array_push(ea, path);
return ea;
}
EAPI Eina_Iterator *
eina_file_ls(const char *dir)
{
Eina_File_Iterator *it;
size_t length;
EINA_SAFETY_ON_NULL_RETURN_VAL(dir, NULL);
length = strlen(dir);
if (length < 1)
return NULL;
it = calloc(1, sizeof (Eina_File_Iterator) + length);
if (!it)
return NULL;
EINA_MAGIC_SET(&it->iterator, EINA_MAGIC_ITERATOR);
it->dirp = opendir(dir);
if (!it->dirp)
{
free(it);
return NULL;
}
memcpy(it->dir, dir, length + 1);
if (dir[length - 1] != '/')
it->length = length;
else
it->length = length - 1;
it->iterator.version = EINA_ITERATOR_VERSION;
it->iterator.next = FUNC_ITERATOR_NEXT(_eina_file_ls_iterator_next);
it->iterator.get_container = FUNC_ITERATOR_GET_CONTAINER(
_eina_file_ls_iterator_container);
it->iterator.free = FUNC_ITERATOR_FREE(_eina_file_ls_iterator_free);
return &it->iterator;
}
EAPI Eina_Iterator *
eina_file_direct_ls(const char *dir)
{
Eina_File_Direct_Iterator *it;
size_t length;
EINA_SAFETY_ON_NULL_RETURN_VAL(dir, NULL);
length = strlen(dir);
if (length < 1)
return NULL;
if (length + NAME_MAX + 2 >= EINA_PATH_MAX)
return NULL;
it = calloc(1, sizeof(Eina_File_Direct_Iterator) + length);
if (!it)
return NULL;
EINA_MAGIC_SET(&it->iterator, EINA_MAGIC_ITERATOR);
it->dirp = opendir(dir);
if (!it->dirp)
{
free(it);
return NULL;
}
memcpy(it->dir, dir, length + 1);
it->length = length;
memcpy(it->info.path, dir, length);
if (dir[length - 1] == '/')
it->info.name_start = length;
else
{
it->info.path[length] = '/';
it->info.name_start = length + 1;
}
it->iterator.version = EINA_ITERATOR_VERSION;
it->iterator.next = FUNC_ITERATOR_NEXT(_eina_file_direct_ls_iterator_next);
it->iterator.get_container = FUNC_ITERATOR_GET_CONTAINER(
_eina_file_direct_ls_iterator_container);
it->iterator.free = FUNC_ITERATOR_FREE(_eina_file_direct_ls_iterator_free);
return &it->iterator;
}
EAPI Eina_Iterator *
eina_file_stat_ls(const char *dir)
{
Eina_File_Direct_Iterator *it;
size_t length;
EINA_SAFETY_ON_NULL_RETURN_VAL(dir, NULL);
length = strlen(dir);
if (length < 1)
return NULL;
if (length + NAME_MAX + 2 >= EINA_PATH_MAX)
return NULL;
it = calloc(1, sizeof(Eina_File_Direct_Iterator) + length);
if (!it)
return NULL;
EINA_MAGIC_SET(&it->iterator, EINA_MAGIC_ITERATOR);
it->dirp = opendir(dir);
if (!it->dirp)
{
free(it);
return NULL;
}
memcpy(it->dir, dir, length + 1);
it->length = length;
memcpy(it->info.path, dir, length);
if (dir[length - 1] == '/')
it->info.name_start = length;
else
{
it->info.path[length] = '/';
it->info.name_start = length + 1;
}
it->iterator.version = EINA_ITERATOR_VERSION;
it->iterator.next = FUNC_ITERATOR_NEXT(_eina_file_stat_ls_iterator_next);
it->iterator.get_container = FUNC_ITERATOR_GET_CONTAINER(
_eina_file_direct_ls_iterator_container);
it->iterator.free = FUNC_ITERATOR_FREE(_eina_file_direct_ls_iterator_free);
return &it->iterator;
}
EAPI Eina_File *
eina_file_open(const char *filename, Eina_Bool shared)
{
Eina_File *file;
Eina_File *n;
struct stat file_stat;
int fd;
int flags;
EINA_SAFETY_ON_NULL_RETURN_VAL(filename, NULL);
/*
FIXME: always open absolute path
(need to fix filename according to current directory)
*/
if (shared)
#ifdef HAVE_SHMOPEN
fd = shm_open(filename, O_RDONLY, S_IRWXU | S_IRWXG | S_IRWXO);
#else
return NULL;
#endif
else
fd = open(filename, O_RDONLY, S_IRWXU | S_IRWXG | S_IRWXO);
if (fd < 0) return NULL;
flags = fcntl(fd, F_GETFD);
if (flags == -1)
goto on_error;
flags |= FD_CLOEXEC;
if (fcntl(fd, F_SETFD, flags) == -1)
goto on_error;
if (fstat(fd, &file_stat))
goto on_error;
eina_lock_take(&_eina_file_lock_cache);
file = eina_hash_find(_eina_file_cache, filename);
if ((file) &&
((file->mtime != file_stat.st_mtime) ||
(file->length != (unsigned long long) file_stat.st_size) ||
(file->inode != file_stat.st_ino)))
// FIXME: handle sub-second resolution correctness
{
file->delete_me = EINA_TRUE;
eina_hash_del(_eina_file_cache, file->filename, file);
file = NULL;
}
if (!file)
{
n = malloc(sizeof (Eina_File) + strlen(filename) + 1);
if (!n) goto on_error;
n->filename = (char*) (n + 1);
strcpy((char*) n->filename, filename);
n->map = eina_hash_new(EINA_KEY_LENGTH(_eina_file_map_key_length),
EINA_KEY_CMP(_eina_file_map_key_cmp),
EINA_KEY_HASH(_eina_file_map_key_hash),
EINA_FREE_CB(_eina_file_map_close),
3);
n->rmap = eina_hash_pointer_new(NULL);
n->global_map = MAP_FAILED;
n->global_refcount = 0;
n->length = file_stat.st_size;
n->mtime = file_stat.st_mtime;
n->inode = file_stat.st_ino;
n->refcount = 0;
n->fd = fd;
n->shared = shared;
n->delete_me = EINA_FALSE;
eina_lock_new(&n->lock);
eina_hash_direct_add(_eina_file_cache, n->filename, n);
}
else
{
close(fd);
n = file;
}
eina_lock_take(&n->lock);
n->refcount++;
eina_lock_release(&n->lock);
eina_lock_release(&_eina_file_lock_cache);
return n;
on_error:
close(fd);
return NULL;
}
EAPI void
eina_file_close(Eina_File *file)
{
EINA_SAFETY_ON_NULL_RETURN(file);
eina_lock_take(&file->lock);
file->refcount--;
eina_lock_release(&file->lock);
if (file->refcount != 0) return;
eina_hash_del(_eina_file_cache, file->filename, file);
}
EAPI size_t
eina_file_size_get(Eina_File *file)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(file, 0);
return file->length;
}
EAPI time_t
eina_file_mtime_get(Eina_File *file)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(file, 0);
return file->mtime;
}
EAPI const char *
eina_file_filename_get(Eina_File *file)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(file, NULL);
return file->filename;
}
EAPI void *
eina_file_map_all(Eina_File *file, Eina_File_Populate rule)
{
int flags = MAP_SHARED;
void *ret = NULL;
EINA_SAFETY_ON_NULL_RETURN_VAL(file, NULL);
// bsd people will lack this feature
#ifdef MAP_POPULATE
if (rule == EINA_FILE_POPULATE) flags |= MAP_POPULATE;
#endif
#ifdef MAP_HUGETLB
if (file->length > EINA_HUGE_PAGE) flags |= MAP_HUGETLB;
#endif
eina_mmap_safety_enabled_set(EINA_TRUE);
eina_lock_take(&file->lock);
if (file->global_map == MAP_FAILED)
file->global_map = mmap(NULL, file->length, PROT_READ, flags, file->fd, 0);
if (file->global_map != MAP_FAILED)
{
_eina_file_map_rule_apply(rule, file->global_map, file->length);
file->global_refcount++;
ret = file->global_map;
}
eina_lock_release(&file->lock);
return ret;
}
EAPI void *
eina_file_map_new(Eina_File *file, Eina_File_Populate rule,
unsigned long int offset, unsigned long int length)
{
Eina_File_Map *map;
unsigned long int key[2];
EINA_SAFETY_ON_NULL_RETURN_VAL(file, NULL);
if (offset > file->length)
return NULL;
if (offset + length > file->length)
return NULL;
if (offset == 0 && length == file->length)
return eina_file_map_all(file, rule);
key[0] = offset;
key[1] = length;
eina_mmap_safety_enabled_set(EINA_TRUE);
eina_lock_take(&file->lock);
map = eina_hash_find(file->map, &key);
if (!map)
{
int flags = MAP_SHARED;
// bsd people will lack this feature
#ifdef MAP_POPULATE
if (rule == EINA_FILE_POPULATE) flags |= MAP_POPULATE;
#endif
#ifdef MAP_HUGETLB
if (length > EINA_HUGE_PAGE) flags |= MAP_HUGETLB;
#endif
map = malloc(sizeof (Eina_File_Map));
if (!map) goto on_error;
map->map = mmap(NULL, length, PROT_READ, flags, file->fd, offset);
map->offset = offset;
map->length = length;
map->refcount = 0;
if (map->map == MAP_FAILED) goto on_error;
eina_hash_add(file->map, &key, map);
eina_hash_direct_add(file->rmap, map->map, map);
}
map->refcount++;
_eina_file_map_rule_apply(rule, map->map, length);
eina_lock_release(&file->lock);
return map->map;
on_error:
free(map);
eina_lock_release(&file->lock);
return NULL;
}
EAPI void
eina_file_map_free(Eina_File *file, void *map)
{
EINA_SAFETY_ON_NULL_RETURN(file);
eina_lock_take(&file->lock);
if (file->global_map == map)
{
file->global_refcount--;
if (file->global_refcount > 0) goto on_exit;
munmap(file->global_map, file->length);
file->global_map = MAP_FAILED;
}
else
{
Eina_File_Map *em;
unsigned long int key[2];
em = eina_hash_find(file->rmap, &map);
if (!em) return ;
em->refcount--;
if (em->refcount > 0) goto on_exit;
key[0] = em->offset;
key[1] = em->length;
eina_hash_del(file->rmap, &map, em);
eina_hash_del(file->map, &key, em);
}
on_exit:
eina_lock_release(&file->lock);
}
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