cpu/native: allow multiple netdev2 tap devices

With arg added to async_read callback in 7020b7c0, we don't need to keep
track of netdev2_tap locally. As a result we can use multiple
netdev2_tap instances.

cpu/native/async_read.c

@@ -69,11 +69,12 @@ void native_async_read_setup(void) {
 void native_async_read_cleanup(void) {
     unregister_interrupt(SIGIO);
 
-#ifdef __MACH__
     for (int i = 0; i < _next_index; i++) {
+#ifdef __MACH__
         kill(_sigio_child_pids[i], SIGKILL);
-    }
 #endif
+        real_close(_fds[i]);
+    }
 }
 
 void native_async_read_continue(int fd) {

cpu/native/include/netdev2_tap.h

@@ -54,11 +54,6 @@ typedef struct {
                                              inteface to bind to. */
 } netdev2_tap_params_t;
 
-/**
- * @brief global device struct. driver only supports one tap device as of now.
- */
-extern netdev2_tap_t netdev2_tap;
-
 /**
  * @brief Setup netdev2_tap_t structure.
  *
@@ -67,13 +62,6 @@ extern netdev2_tap_t netdev2_tap;
  */
 void netdev2_tap_setup(netdev2_tap_t *dev, const netdev2_tap_params_t *params);
 
-/**
- * @brief Cleanup tap resources
- *
- * @param dev  the netdev2_tap device handle to cleanup
- */
-void netdev2_tap_cleanup(netdev2_tap_t *dev);
-
 #ifdef __cplusplus
 }
 #endif

cpu/native/include/tty_uart.h

@@ -33,11 +33,6 @@ extern "C" {
  */
 void tty_uart_setup(uart_t uart, const char *name);
 
-/**
- * @brief   closes files opened
- */
-void uart_cleanup(void);
-
 #ifdef __cplusplus
 }
 #endif

cpu/native/netdev2_tap/netdev2_tap.c

@@ -60,9 +60,6 @@
 #define ENABLE_DEBUG (0)
 #include "debug.h"
 
-/* support one tap interface for now */
-netdev2_tap_t netdev2_tap;
-
 /* netdev2 interface */
 static int _init(netdev2_t *netdev);
 static int _send(netdev2_t *netdev, const struct iovec *vector, unsigned n);
@@ -107,10 +104,6 @@ static inline void _isr(netdev2_t *netdev)
 
 static int _get(netdev2_t *dev, netopt_t opt, void *value, size_t max_len)
 {
-    if (dev != (netdev2_t *)&netdev2_tap) {
-        return -ENODEV;
-    }
-
     int res = 0;
 
     switch (opt) {
@@ -138,11 +131,6 @@ static int _get(netdev2_t *dev, netopt_t opt, void *value, size_t max_len)
 static int _set(netdev2_t *dev, netopt_t opt, void *value, size_t value_len)
 {
     (void)value_len;
-
-    if (dev != (netdev2_t *)&netdev2_tap) {
-        return -ENODEV;
-    }
-
     int res = 0;
 
     switch (opt) {
@@ -307,9 +295,8 @@ void netdev2_tap_setup(netdev2_tap_t *dev, const netdev2_tap_params_t *params) {
 
 static void _tap_isr(int fd, void *arg) {
     (void) fd;
-    (void) arg;
 
-    netdev2_t *netdev = (netdev2_t *)&netdev2_tap;
+    netdev2_t *netdev = (netdev2_t *)arg;
 
     if (netdev->event_callback) {
         netdev->event_callback(netdev, NETDEV2_EVENT_ISR);
@@ -392,7 +379,7 @@ static int _init(netdev2_t *netdev)
 
     /* configure signal handler for fds */
     native_async_read_setup();
-    native_async_read_add_handler(dev->tap_fd, NULL, _tap_isr);
+    native_async_read_add_handler(dev->tap_fd, netdev, _tap_isr);
 
 #ifdef MODULE_NETSTATS_L2
     memset(&netdev->stats, 0, sizeof(netstats_t));
@@ -401,16 +388,3 @@ static int _init(netdev2_t *netdev)
     return 0;
 }
 
-void netdev2_tap_cleanup(netdev2_tap_t *dev)
-{
-    /* Do we have a device */
-    if (!dev) {
-        return;
-    }
-
-    /* cleanup signal handling */
-    native_async_read_cleanup();
-
-    /* close the tap device */
-    real_close(dev->tap_fd);
-}

cpu/native/periph/pm.c

@@ -22,7 +22,7 @@
 
 #include "periph/pm.h"
 #include "native_internal.h"
-#include "netdev2_tap.h"
+#include "async_read.h"
 #include "tty_uart.h"
 
 #define ENABLE_DEBUG (0)
@@ -50,11 +50,7 @@ void pm_reboot(void)
 {
     printf("\n\n\t\t!! REBOOT !!\n\n");
 
-#ifdef MODULE_NETDEV2_TAP
-    netdev2_tap_cleanup(&netdev2_tap);
-#endif
-
-    uart_cleanup();
+    native_async_read_cleanup();
 
     if (real_execve(_native_argv[0], _native_argv, NULL) == -1) {
         err(EXIT_FAILURE, "reboot: execve");

cpu/native/periph/uart.c

@@ -175,14 +175,4 @@ void uart_write(uart_t uart, const uint8_t *data, size_t len)
     _native_write(tty_fds[uart], data, len);
 }
 
-void uart_cleanup(void) {
-    native_async_read_cleanup();
-
-    for (uart_t uart = 0; uart < UART_NUMOF; uart++) {
-        if (uart_config[uart].rx_cb != NULL) {
-            real_close(tty_fds[uart]);
-        }
-    }
-}
-
 /** @} */