80 lines
1.6 KiB
C
80 lines
1.6 KiB
C
#include "tos_vfs.h"
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#if TOS_CFG_VFS_EN > 0u
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__STATIC__ vfs_file_t vfs_file_pool[VFS_FILE_OPEN_MAX] = { { K_NULL, 0 } };
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__KERNEL__ vfs_file_t *vfs_fd2file(int fd)
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{
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if (unlikely(fd < 0 || fd >= VFS_FILE_OPEN_MAX)) {
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return K_NULL;
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}
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return &vfs_file_pool[fd];
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}
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__KERNEL__ int vfs_file2fd(vfs_file_t *file)
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{
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if (unlikely((cpu_addr_t)file < (cpu_addr_t)&vfs_file_pool[0] ||
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(cpu_addr_t)file > (cpu_addr_t)&vfs_file_pool[VFS_FILE_OPEN_MAX - 1])) {
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return -1;
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}
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return (cpu_addr_t)file - (cpu_addr_t)&vfs_file_pool[0];
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}
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__KERNEL__ vfs_file_t *vfs_file_alloc(void)
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{
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int i = 0;
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vfs_file_t *file = K_NULL;
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for (; i < VFS_FILE_OPEN_MAX; ++i) {
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file = &vfs_file_pool[i];
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if (file->inode == K_NULL) {
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return file;
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}
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}
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return K_NULL;
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}
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__KERNEL__ void vfs_file_free(vfs_file_t *file)
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{
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if (vfs_file2fd(file) < 0) {
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return;
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}
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file->inode = K_NULL;
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file->pos = 0;
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}
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__KERNEL__ vfs_file_t *vfs_file_dup(vfs_file_t *old_file)
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{
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vfs_file_t *new_file = K_NULL;
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new_file = vfs_file_alloc();
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if (!new_file) {
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return K_NULL;
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}
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vfs_inode_refinc(old_file->inode);
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new_file->flags = old_file->flags;
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new_file->pos = old_file->pos;
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new_file->inode = old_file->inode;
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new_file->private = old_file->private;
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return new_file;
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}
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__KERNEL__ vfs_dir_t *vfs_dir_alloc(void)
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{
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return (vfs_dir_t *)tos_mmheap_calloc(1, sizeof(vfs_dir_t));
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}
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__KERNEL__ void vfs_dir_free(vfs_dir_t *dir)
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{
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tos_mmheap_free(dir);
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}
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#endif
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