/* Copyright (C) 2014 Stony Brook University
This file is part of Graphene Library OS.
Graphene Library OS 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 3 of the
License, or (at your option) any later version.
Graphene Library OS 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 program. If not, see . */
/*
* shim_syscalls.c
*
* This file contain functions to allocate / free a fixed-size string object.
*/
#include
#include
static struct shim_lock str_mgr_lock;
#define SYSTEM_LOCK() lock(&str_mgr_lock)
#define SYSTEM_UNLOCK() unlock(&str_mgr_lock)
#define STR_MGR_ALLOC 32
#define PAGE_SIZE allocsize
#define OBJ_TYPE struct shim_str
#include "memmgr.h"
static MEM_MGR str_mgr = NULL;
int init_str_mgr(void) {
create_lock(&str_mgr_lock);
str_mgr = create_mem_mgr(init_align_up(STR_MGR_ALLOC));
return 0;
}
struct shim_str* get_str_obj(void) {
return get_mem_obj_from_mgr_enlarge(str_mgr, size_align_up(STR_MGR_ALLOC));
}
int free_str_obj(struct shim_str* str) {
if (str == NULL)
return 0;
if (memory_migrated(str)) {
memset(str, 0, sizeof(struct shim_str));
return 0;
}
free_mem_obj_to_mgr(str_mgr, str);
return 0;
}