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main_repo / deps / liboi / oi_file.c @ 40c0f755
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#include <stdio.h> |
|---|---|
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include <assert.h> |
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#include <errno.h> |
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|
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#include <ev.h> |
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#include <oi.h> |
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|
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#define RELEASE_BUF(buf) if(buf->release) { buf->release(buf); } |
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#define DRAIN_CB(file) if(file->on_drain) { file->on_drain(file); } |
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#define RAISE_ERROR(s, _domain, _code) do { \ |
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if(s->on_error) { \
|
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struct oi_error __oi_error; \
|
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__oi_error.domain = _domain; \ |
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__oi_error.code = _code; \ |
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s->on_error(s, __oi_error); \ |
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} \ |
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} while(0) \ |
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|
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/* forwards */
|
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static void dispatch_write_buf (oi_file *file); |
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static void maybe_do_read (oi_file *file); |
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|
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static void |
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after_read(oi_task *task, ssize_t recved) |
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{
|
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oi_file *file = task->data; |
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|
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if(recved == -1) { |
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RAISE_ERROR(file, OI_ERROR_READ, errno); |
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return;
|
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} |
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|
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if(recved == 0) |
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oi_file_read_stop(file); |
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|
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if(file->on_read)
|
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file->on_read(file, recved); |
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|
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maybe_do_read(file); |
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} |
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|
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static void |
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maybe_do_read(oi_file *file) |
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{
|
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if ( file->read_buffer == NULL |
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|| file->write_buf != NULL
|
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|| file->write_socket != NULL
|
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|| !oi_queue_empty(&file->write_queue) |
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|| file->io_task.active |
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) return;
|
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|
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assert(file->fd > 0);
|
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|
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oi_task_init_read ( &file->io_task |
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, after_read |
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, file->fd |
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, file->read_buffer |
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, file->read_buffer_size |
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); |
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file->io_task.data = file; |
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oi_async_submit(&file->async, &file->io_task); |
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} |
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|
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static void |
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submit_read (oi_file *file) |
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{
|
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} |
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|
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int
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oi_file_init (oi_file *file) |
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{
|
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oi_async_init(&file->async); |
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file->async.data = file; |
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|
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oi_queue_init(&file->write_queue); |
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|
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file->fd = -1;
|
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file->loop = NULL;
|
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file->write_buf = NULL;
|
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file->read_buffer = NULL;
|
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|
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file->on_open = NULL;
|
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file->on_read = NULL;
|
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file->on_drain = NULL;
|
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file->on_error = NULL;
|
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file->on_close = NULL;
|
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return 0; |
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} |
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|
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void
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oi_file_read_start (oi_file *file, void *buffer, size_t bufsize)
|
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{
|
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file->read_buffer = buffer; |
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file->read_buffer_size = bufsize; |
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maybe_do_read(file); |
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} |
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|
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void
|
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oi_file_read_stop (oi_file *file) |
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{
|
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file->read_buffer = NULL;
|
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} |
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|
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void
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oi_api_free_buf_with_heap_base(oi_buf *buf) |
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{
|
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free(buf->base); |
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free(buf); |
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} |
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|
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static void |
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after_open(oi_task *task, int result)
|
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{
|
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oi_file *file = task->data; |
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|
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if(result == -1) { |
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RAISE_ERROR(file, OI_ERROR_OPEN, errno); |
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return;
|
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} |
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|
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file->fd = result; |
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|
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if(file->on_open) {
|
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file->on_open(file); |
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} |
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|
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maybe_do_read(file); |
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} |
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|
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int
|
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oi_file_open_path (oi_file *file, const char *path, int flags, mode_t mode) |
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{
|
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if(file->fd >= 0) |
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return -1; |
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oi_task_init_open( &file->io_task |
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, after_open |
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, path |
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, flags |
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, mode |
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); |
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file->io_task.data = file; |
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oi_async_submit(&file->async, &file->io_task); |
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return 0; |
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} |
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|
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int
|
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oi_file_open_stdin (oi_file *file) |
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{
|
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if(file->fd >= 0) |
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return -1; |
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file->fd = STDIN_FILENO; |
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if(file->on_open)
|
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file->on_open(file); |
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return 0; |
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} |
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|
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int
|
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oi_file_open_stdout (oi_file *file) |
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{
|
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if(file->fd >= 0) |
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return -1; |
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file->fd = STDOUT_FILENO; |
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if(file->on_open)
|
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file->on_open(file); |
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return 0; |
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} |
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|
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int
|
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oi_file_open_stderr (oi_file *file) |
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{
|
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if(file->fd >= 0) |
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return -1; |
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file->fd = STDERR_FILENO; |
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if(file->on_open)
|
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file->on_open(file); |
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return 0; |
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} |
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|
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void
|
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oi_file_attach (oi_file *file, struct ev_loop *loop)
|
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{
|
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oi_async_attach (loop, &file->async); |
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file->loop = loop; |
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} |
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|
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void
|
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oi_file_detach (oi_file *file) |
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{
|
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oi_async_detach (&file->async); |
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file->loop = NULL;
|
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} |
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|
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static void |
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after_write(oi_task *task, ssize_t result) |
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{
|
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oi_file *file = task->data; |
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|
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if(result == -1) { |
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RAISE_ERROR(file, OI_ERROR_WRITE, errno); |
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return;
|
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} |
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|
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assert(file->write_buf != NULL);
|
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oi_buf *buf = file->write_buf; |
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|
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buf->written += result; |
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if(buf->written < buf->len) {
|
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oi_task_init_write ( &file->io_task |
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, after_write |
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, file->fd |
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, buf->base + buf->written |
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, buf->len - buf->written |
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); |
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file->io_task.data = file; |
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oi_async_submit(&file->async, &file->io_task); |
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return;
|
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} |
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|
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assert(buf->written == buf->len); |
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|
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RELEASE_BUF(file->write_buf); |
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file->write_buf = NULL;
|
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|
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if(oi_queue_empty(&file->write_queue)) {
|
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DRAIN_CB(file); |
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maybe_do_read(file); |
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} else {
|
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dispatch_write_buf(file); |
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} |
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|
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return;
|
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} |
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|
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static void |
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dispatch_write_buf(oi_file *file) |
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{
|
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if(file->write_buf != NULL) |
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return;
|
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if(oi_queue_empty(&file->write_queue))
|
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return;
|
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|
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oi_queue *q = oi_queue_last(&file->write_queue); |
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oi_queue_remove(q); |
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oi_buf *buf = file->write_buf = oi_queue_data(q, oi_buf, queue); |
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|
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assert(!file->io_task.active); |
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oi_task_init_write ( &file->io_task |
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, after_write |
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, file->fd |
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, buf->base + buf->written |
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, buf->len - buf->written |
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); |
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file->io_task.data = file; |
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oi_async_submit(&file->async, &file->io_task); |
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} |
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|
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int
|
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oi_file_write (oi_file *file, oi_buf *buf) |
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{
|
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if(file->fd < 0) |
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return -1; |
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if(file->read_buffer)
|
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return -2; |
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/* TODO better business check*/
|
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|
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buf->written = 0;
|
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oi_queue_insert_head(&file->write_queue, &buf->queue); |
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dispatch_write_buf(file); |
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|
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return 0; |
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} |
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|
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// Writes a string to the file.
|
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// NOTE: Allocates memory. Avoid for performance applications.
|
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int
|
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oi_file_write_simple (oi_file *file, const char *str, size_t len) |
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{
|
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if(file->fd < 0) |
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return -1; |
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if(file->read_buffer)
|
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return -2; |
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/* TODO better business check*/
|
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|
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oi_buf *buf = malloc(sizeof(oi_buf));
|
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buf->base = malloc(len); |
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memcpy(buf->base, str, len); |
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buf->len = len; |
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buf->release = oi_api_free_buf_with_heap_base; |
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|
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oi_file_write(file, buf); |
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return 0; |
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} |
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|
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static void |
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clear_write_queue(oi_file *file) |
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{
|
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while(!oi_queue_empty(&file->write_queue)) {
|
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oi_queue *q = oi_queue_last(&file->write_queue); |
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oi_queue_remove(q); |
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oi_buf *buf = oi_queue_data(q, oi_buf, queue); |
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RELEASE_BUF(buf); |
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} |
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} |
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|
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static void |
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after_close(oi_task *task, int result)
|
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{
|
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oi_file *file = task->data; |
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|
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assert(oi_queue_empty(&file->write_queue)); |
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|
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if(result == -1) { |
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RAISE_ERROR(file, OI_ERROR_CLOSE, errno); |
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return;
|
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// TODO try to close again?
|
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} |
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|
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file->fd = -1;
|
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// TODO deinit task_queue, detach thread_pool_result_watcher
|
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|
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if(file->on_close) {
|
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file->on_close(file); |
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} |
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|
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return;
|
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} |
| 330 |
|
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void
|
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oi_file_close (oi_file *file) |
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{
|
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assert(file->fd >= 0 && "file not open!"); |
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clear_write_queue(file); |
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oi_task_init_close ( &file->io_task |
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, after_close |
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, file->fd |
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); |
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file->io_task.data = file; |
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oi_async_submit(&file->async, &file->io_task); |
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} |
| 343 |
|
| 344 |
static void |
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after_sendfile(oi_task *task, ssize_t sent) |
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{
|
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oi_file *file = task->data; |
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oi_socket *socket = file->write_socket; |
| 349 |
assert(socket != NULL);
|
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file->write_socket = NULL;
|
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|
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if(sent == -1) { |
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RAISE_ERROR(file, OI_ERROR_SENDFILE, errno); |
| 354 |
return;
|
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} |
| 356 |
|
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if(socket->on_drain) {
|
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socket->on_drain(socket); |
| 359 |
} |
| 360 |
|
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maybe_do_read(file); |
| 362 |
} |
| 363 |
|
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int
|
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oi_file_send (oi_file *file, oi_socket *destination, off_t offset, size_t count) |
| 366 |
{
|
| 367 |
if(file->fd < 0) |
| 368 |
return -1; |
| 369 |
if(file->read_buffer)
|
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return -2; |
| 371 |
/* TODO better business check*/
|
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|
| 373 |
assert(file->write_socket == NULL);
|
| 374 |
// (1) make sure the write queue on the socket is cleared.
|
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//
|
| 376 |
// (2)
|
| 377 |
//
|
| 378 |
file->write_socket = destination; |
| 379 |
oi_task_init_sendfile ( &file->io_task |
| 380 |
, after_sendfile |
| 381 |
, destination->fd |
| 382 |
, file->fd |
| 383 |
, offset |
| 384 |
, count |
| 385 |
); |
| 386 |
file->io_task.data = file; |
| 387 |
oi_async_submit(&file->async, &file->io_task); |
| 388 |
|
| 389 |
return 0; |
| 390 |
} |
| 391 |
|