405e5d970a
1. see: TencentOS-tiny\board\STM8L052R8T6\IAR\hello_world 2. compile/debug/run with IAR for STM8
80 lines
1.6 KiB
C
80 lines
1.6 KiB
C
#include "tos_vfs.h"
|
|
|
|
#if TOS_CFG_VFS_EN > 0u
|
|
|
|
__STATIC__ vfs_file_t vfs_file_pool[VFS_FILE_OPEN_MAX] = { { K_NULL, 0 } };
|
|
|
|
__KNL__ vfs_file_t *vfs_fd2file(int fd)
|
|
{
|
|
if (unlikely(fd < 0 || fd >= VFS_FILE_OPEN_MAX)) {
|
|
return K_NULL;
|
|
}
|
|
return &vfs_file_pool[fd];
|
|
}
|
|
|
|
__KNL__ int vfs_file2fd(vfs_file_t *file)
|
|
{
|
|
if (unlikely((cpu_addr_t)file < (cpu_addr_t)&vfs_file_pool[0] ||
|
|
(cpu_addr_t)file > (cpu_addr_t)&vfs_file_pool[VFS_FILE_OPEN_MAX - 1])) {
|
|
return -1;
|
|
}
|
|
|
|
return (cpu_addr_t)file - (cpu_addr_t)&vfs_file_pool[0];
|
|
}
|
|
|
|
__KNL__ vfs_file_t *vfs_file_alloc(void)
|
|
{
|
|
int i = 0;
|
|
vfs_file_t *file = K_NULL;
|
|
|
|
for (; i < VFS_FILE_OPEN_MAX; ++i) {
|
|
file = &vfs_file_pool[i];
|
|
if (file->inode == K_NULL) {
|
|
return file;
|
|
}
|
|
}
|
|
return K_NULL;
|
|
}
|
|
|
|
__KNL__ void vfs_file_free(vfs_file_t *file)
|
|
{
|
|
if (vfs_file2fd(file) < 0) {
|
|
return;
|
|
}
|
|
|
|
file->inode = K_NULL;
|
|
file->pos = 0;
|
|
}
|
|
|
|
__KNL__ vfs_file_t *vfs_file_dup(vfs_file_t *old_file)
|
|
{
|
|
vfs_file_t *new_file = K_NULL;
|
|
|
|
new_file = vfs_file_alloc();
|
|
if (!new_file) {
|
|
return K_NULL;
|
|
}
|
|
|
|
vfs_inode_refinc(old_file->inode);
|
|
|
|
new_file->flags = old_file->flags;
|
|
new_file->pos = old_file->pos;
|
|
new_file->inode = old_file->inode;
|
|
new_file->private = old_file->private;
|
|
|
|
return new_file;
|
|
}
|
|
|
|
__KNL__ vfs_dir_t *vfs_dir_alloc(void)
|
|
{
|
|
return (vfs_dir_t *)tos_mmheap_calloc(1, sizeof(vfs_dir_t));
|
|
}
|
|
|
|
__KNL__ void vfs_dir_free(vfs_dir_t *dir)
|
|
{
|
|
tos_mmheap_free(dir);
|
|
}
|
|
|
|
#endif
|
|
|