| 43,8 → 43,12 |
|---|
| #include <bool.h> |
| #include <futex.h> |
| #include <libadt/list.h> |
| #include <sys/types.h> |
| #include "vfs.h" |
| |
| /** Per-connection futex protecting the files array. */ |
| __thread atomic_t files_futex = FUTEX_INITIALIZER; |
| |
| /** |
| * This is a per-connection table of open files. |
| * Our assumption is that each client opens only one connection and therefore |
| 53,18 → 57,34 |
|---|
| * several tables and several file handle name spaces per task. Besides of this, |
| * the functionality will stay unchanged. So unless the client knows what it is |
| * doing, it should open one connection to VFS only. |
| * |
| * Allocation of the open files table is deferred until the client makes the |
| * first VFS_OPEN operation. |
| */ |
| __thread vfs_file_t files[MAX_OPEN_FILES]; |
| __thread vfs_file_t *files = NULL; |
| |
| /** Initialize the table of open files. */ |
| bool vfs_conn_open_files_init(void) |
| static bool vfs_conn_open_files_init(void) |
| { |
| memset(files, 0, MAX_OPEN_FILES * sizeof(vfs_file_t)); |
| futex_down(&files_futex); |
| if (!files) { |
| files = malloc(MAX_OPEN_FILES * sizeof(vfs_file_t)); |
| if (!files) { |
| futex_up(&files_futex); |
| return false; |
| } |
| memset(files, 0, MAX_OPEN_FILES * sizeof(vfs_file_t)); |
| } |
| futex_up(&files_futex); |
| return true; |
| } |
| |
| void vfs_open(ipc_callid_t rid, ipc_call_t *request) |
| { |
| if (!vfs_conn_open_files_init()) { |
| ipc_answer_fast_0(rid, ENOMEM); |
| return; |
| } |
| } |
| |
| /** |