sys: remove chardev_thread

sys/chardev_thread.c

-/**
- * Character device messaging loop.
- *
- * Copyright (C) 2013, INRIA.
- *
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
- *
- * @ingroup chardev
- * @{
- * @file
- * @brief   Runs an infinite loop in a separate thread to handle access to character devices such as uart.
- * @author  Kaspar Schleiser <kaspar@schleiser.de>
- * @}
- */
-
-#include <stdio.h>
-#include <errno.h>
-
-#include "irq.h"
-#include "msg.h"
-
-#include "ringbuffer.h"
-#include "posix_io.h"
-
-/* increase stack size in uart0 when setting this to 1 */
-#define ENABLE_DEBUG    (0)
-#include "debug.h"
-
-static int min(int a, int b)
-{
-    if (b > a) {
-        return a;
-    }
-    else {
-        return b;
-    }
-}
-
-void chardev_loop(ringbuffer_t *rb)
-{
-    msg_t m;
-
-    kernel_pid_t reader_pid = KERNEL_PID_UNDEF;
-    struct posix_iop_t *r = NULL;
-
-    puts("UART0 thread started.");
-
-    while (1) {
-        msg_receive(&m);
-
-        if (!msg_sent_by_int(&m)) {
-            DEBUG("Receiving message from another thread: ");
-
-            switch(m.type) {
-                case OPEN:
-                    DEBUG("OPEN\n");
-                    if (reader_pid == KERNEL_PID_UNDEF) {
-                        reader_pid = m.sender_pid;
-                        /* no error */
-                        m.content.value = 0;
-                    }
-                    else {
-                        m.content.value = -EBUSY;
-                    }
-
-                    msg_reply(&m, &m);
-                    break;
-
-                case READ:
-                    DEBUG("READ\n");
-                    if (m.sender_pid != reader_pid) {
-                        m.content.value = -EINVAL;
-                        r = NULL;
-                        msg_reply(&m, &m);
-                    }
-                    else {
-                        r = (struct posix_iop_t *)(void*)m.content.ptr;
-                    }
-
-                    break;
-
-                case CLOSE:
-                    DEBUG("CLOSE\n");
-                    if (m.sender_pid == reader_pid) {
-                        DEBUG("uart0_thread: closing file from %" PRIkernel_pid "\n", reader_pid);
-                        reader_pid = KERNEL_PID_UNDEF;
-                        r = NULL;
-                        m.content.value = 0;
-                    }
-                    else {
-                        m.content.value = -EINVAL;
-                    }
-
-                    msg_reply(&m, &m);
-                    break;
-
-                default:
-                    DEBUG("UNKNOWN\n");
-                    m.content.value = -EINVAL;
-                    msg_reply(&m, &m);
-            }
-        }
-
-        if (rb->avail && (r != NULL)) {
-            DEBUG("Data is available\n");
-            unsigned state = disableIRQ();
-            int nbytes = min(r->nbytes, rb->avail);
-            DEBUG("uart0_thread [%i]: sending %i bytes received from %" PRIkernel_pid " to pid %" PRIkernel_pid "\n", thread_getpid(), nbytes, m.sender_pid, reader_pid);
-            ringbuffer_get(rb, r->buffer, nbytes);
-            r->nbytes = nbytes;
-
-            m.sender_pid = reader_pid;
-            m.type = OPEN;
-            m.content.ptr = (char *)r;
-
-            msg_reply(&m, &m);
-
-            r = NULL;
-            restoreIRQ(state);
-        }
-    }
-}
-
-void *chardev_thread_entry(void *rb_)
-{
-    ringbuffer_t *rb = rb_;
-    chardev_loop(rb);
-    return NULL;
-}

sys/include/chardev_thread.h

-/*
- * Copyright (C) 2010 Kaspar Schleiser
- *
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
- */
-
-
-/**
- * @defgroup    sys_chardevthread Chardev Thread
- * @ingroup     sys
- * @brief       Chardev thread
- * @{
- *
- * @file
- * @brief       Handles I/O from a char devices
- *
- * @author      Kaspar Schleiser <kaspar@schleiser.de>
- */
-
-#ifndef __CHARDEV_THREAD_H
-#define __CHARDEV_THREAD_H
-
-#include "ringbuffer.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-void chardev_loop(ringbuffer_t *rb);
-void *chardev_thread_entry(void *rb_);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* __CHARDEV_THREAD_H */
-/** @} */