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https://github.com/espressif/esp-idf.git
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b203ac7b02
* If CONFIG_VFS_SUPPORT_IO=y, keep everything as it is now * If CONFIG_VFS_SUPPORT_IO=n, defined syscalls which LwIP can implement, such as read/write/close * Make LWIP-only select implementation dependent on CONFIG_VFS_SUPPORT_SELECT, deprecate CONFIG_LWIP_USE_ONLY_LWIP_SELECT
98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
// Copyright 2017 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <string.h>
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#include <stdbool.h>
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#include <stdarg.h>
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#include <sys/errno.h>
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#include <sys/lock.h>
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#include <sys/fcntl.h>
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#include "esp_attr.h"
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#include "esp_vfs.h"
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#include "sdkconfig.h"
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#include "lwip/sockets.h"
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#include "lwip/sys.h"
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#ifndef CONFIG_VFS_SUPPORT_IO
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#error This file should only be built when CONFIG_VFS_SUPPORT_IO=y
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#endif
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_Static_assert(MAX_FDS >= CONFIG_LWIP_MAX_SOCKETS, "MAX_FDS < CONFIG_LWIP_MAX_SOCKETS");
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#ifdef CONFIG_VFS_SUPPORT_SELECT
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static void lwip_stop_socket_select(void *sem)
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{
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sys_sem_signal(sem); //socket_select will return
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}
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static void lwip_stop_socket_select_isr(void *sem, BaseType_t *woken)
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{
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if (sys_sem_signal_isr(sem) && woken) {
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*woken = pdTRUE;
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}
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}
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static void *lwip_get_socket_select_semaphore(void)
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{
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/* Calling this from the same process as select() will ensure that the semaphore won't be allocated from
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* ISR (lwip_stop_socket_select_isr).
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*/
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return (void *) sys_thread_sem_get();
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}
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#else // CONFIG_VFS_SUPPORT_SELECT
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int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct timeval *timeout)
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{
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return lwip_select(nfds, readfds, writefds, errorfds, timeout);
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}
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#endif // CONFIG_VFS_SUPPORT_SELECT
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static int lwip_fcntl_r_wrapper(int fd, int cmd, int arg)
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{
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return lwip_fcntl(fd, cmd, arg);
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}
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static int lwip_ioctl_r_wrapper(int fd, int cmd, va_list args)
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{
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return lwip_ioctl(fd, cmd, va_arg(args, void *));
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}
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void esp_vfs_lwip_sockets_register(void)
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{
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esp_vfs_t vfs = {
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.flags = ESP_VFS_FLAG_DEFAULT,
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.write = &lwip_write,
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.open = NULL,
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.fstat = NULL,
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.close = &lwip_close,
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.read = &lwip_read,
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.fcntl = &lwip_fcntl_r_wrapper,
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.ioctl = &lwip_ioctl_r_wrapper,
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#ifdef CONFIG_VFS_SUPPORT_SELECT
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.socket_select = &lwip_select,
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.get_socket_select_semaphore = &lwip_get_socket_select_semaphore,
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.stop_socket_select = &lwip_stop_socket_select,
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.stop_socket_select_isr = &lwip_stop_socket_select_isr,
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#endif // CONFIG_VFS_SUPPORT_SELECT
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};
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/* Non-LWIP file descriptors are from 0 to (LWIP_SOCKET_OFFSET-1). LWIP
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* file descriptors are registered from LWIP_SOCKET_OFFSET to
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* MAX_FDS-1.
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*/
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ESP_ERROR_CHECK(esp_vfs_register_fd_range(&vfs, NULL, LWIP_SOCKET_OFFSET, MAX_FDS));
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}
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