Merge pull request #5714 from alexischr/update_bockbuild

[mono.git] / support / serial.c

diff --git a/support/serial.c b/support/serial.c
index 36b902defb93b9f12fe77e1c64afe5859db074df..5e3d732c005170bbcd4052841fad7dc3b27b342c 100644 (file)
--- a/support/serial.c
+++ b/support/serial.c
@@ -5,18 +5,26 @@
  * Author: Chris Toshok <toshok@ximian.com>
  */
 
+#include "map.h"
+#include "mph.h"
+
 #include <termios.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <string.h>
 #include <errno.h>
-#if defined(__APPLE__)
-#include "fakepoll.h"
-#else
+#if defined(HAVE_POLL_H)
+#include <poll.h>
+#elif defined(HAVE_SYS_POLL_H)
 #include <sys/poll.h>
 #endif
 #include <sys/ioctl.h>
 
+/* This is for ASYNC_*, serial_struct on linux */
+#if defined(HAVE_LINUX_SERIAL_H)
+#include <linux/serial.h>
+#endif
+
 #include <glib.h>
 
 /* This is for FIONREAD on solaris */
@@ -25,8 +33,17 @@
 #endif
 
 /* sys/time.h (for timeval) is required when using osx 10.3 (but not 10.4) */
-#ifdef __APPLE__
+/* IOKit is a private framework in iOS, so exclude there */
+#if defined(__APPLE__) && !defined(HOST_IOS) && !defined(HOST_WATCHOS) && !defined(HOST_APPLETVOS)
+#define HAVE_IOKIT 1
+#endif
+
+#if defined(HAVE_IOKIT)
 #include <sys/time.h>
+#include <IOKit/IOKitLib.h>
+#include <IOKit/serial/IOSerialKeys.h>
+#include <IOKit/serial/ioss.h>
+#include <IOKit/IOBSD.h>
 #endif
 
 /* This is a copy of System.IO.Ports.Handshake */
@@ -76,7 +93,7 @@ int              write_serial (int fd, guchar *buffer, int offset, int count, in
 int              discard_buffer (int fd, gboolean input);
 gint32           get_bytes_in_buffer (int fd, gboolean input);
 gboolean         is_baud_rate_legal (int baud_rate);
-int              setup_baud_rate (int baud_rate);
+int              setup_baud_rate (int baud_rate, gboolean *custom_baud_rate);
 gboolean         set_attributes (int fd, int baud_rate, MonoParity parity, int dataBits, MonoStopBits stopBits, MonoHandshake handshake);
 MonoSerialSignal get_signals (int fd, gint32 *error);
 gint32           set_signal (int fd, MonoSerialSignal signal, gboolean value);
@@ -158,6 +175,11 @@ discard_buffer (int fd, gboolean input)
 gint32
 get_bytes_in_buffer (int fd, gboolean input)
 {
+#if defined(__HAIKU__)
+       /* FIXME: Haiku doesn't support TIOCOUTQ nor FIONREAD on fds */
+       return -1;
+#define TIOCOUTQ 0
+#endif
        gint32 retval;
 
        if (ioctl (fd, input ? FIONREAD : TIOCOUTQ, &retval) == -1) {
@@ -170,11 +192,12 @@ get_bytes_in_buffer (int fd, gboolean input)
 gboolean
 is_baud_rate_legal (int baud_rate)
 {
-       return setup_baud_rate (baud_rate) != -1;
+       gboolean ignore = FALSE;
+       return setup_baud_rate (baud_rate, &ignore) != -1;
 }
 
 int
-setup_baud_rate (int baud_rate)
+setup_baud_rate (int baud_rate, gboolean *custom_baud_rate)
 {
        switch (baud_rate)
        {
@@ -241,9 +264,21 @@ setup_baud_rate (int baud_rate)
            baud_rate = B75;
            break;
        case 50:
+#ifdef B50
+           baud_rate = B50;
+#else
+           baud_rate = -1;
+           break;
+#endif
        case 0:
-       default:
+#ifdef B0
+           baud_rate = B0;
+#else
            baud_rate = -1;
+#endif
+           break;
+       default:
+               *custom_baud_rate = TRUE;
                break;
        }
        return baud_rate;
@@ -253,6 +288,7 @@ gboolean
 set_attributes (int fd, int baud_rate, MonoParity parity, int dataBits, MonoStopBits stopBits, MonoHandshake handshake)
 {
        struct termios newtio;
+       gboolean custom_baud_rate = FALSE;
 
        if (tcgetattr (fd, &newtio) == -1)
                return FALSE;
@@ -263,7 +299,7 @@ set_attributes (int fd, int baud_rate, MonoParity parity, int dataBits, MonoStop
        newtio.c_iflag = IGNBRK;
 
        /* setup baudrate */
-       baud_rate = setup_baud_rate (baud_rate);
+       baud_rate = setup_baud_rate (baud_rate, &custom_baud_rate);
 
        /* char lenght */
        newtio.c_cflag &= ~CSIZE;
@@ -352,16 +388,55 @@ set_attributes (int fd, int baud_rate, MonoParity parity, int dataBits, MonoStop
            newtio.c_iflag |= IXOFF | IXON;
                break;
        }
-       
-       if (cfsetospeed (&newtio, baud_rate) < 0 || cfsetispeed (&newtio, baud_rate) < 0 ||
-           tcsetattr (fd, TCSANOW, &newtio) < 0)
-       {
+
+       if (custom_baud_rate == FALSE) {
+               if (cfsetospeed (&newtio, baud_rate) < 0 || cfsetispeed (&newtio, baud_rate) < 0)
+                       return FALSE;
+       } else {
+#if __linux__ || defined(HAVE_IOKIT)
+
+               /* On Linux to set a custom baud rate, we must set the
+                * "standard" baud_rate to 38400.   On Apple we set it purely
+                * so that tcsetattr has something to use (and report back later), but
+                * the Apple specific API is still opaque to these APIs, see:
+                * https://developer.apple.com/library/mac/samplecode/SerialPortSample/Listings/SerialPortSample_SerialPortSample_c.html#//apple_ref/doc/uid/DTS10000454-SerialPortSample_SerialPortSample_c-DontLinkElementID_4
+                */
+               if (cfsetospeed (&newtio, B38400) < 0 || cfsetispeed (&newtio, B38400) < 0)
+                       return FALSE;
+#endif
+       }
+
+       if (tcsetattr (fd, TCSANOW, &newtio) < 0)
+               return FALSE;
+
+       if (custom_baud_rate == TRUE){
+#if defined(HAVE_LINUX_SERIAL_H)
+               struct serial_struct ser;
+
+               if (ioctl (fd, TIOCGSERIAL, &ser) < 0)
+               {
+                       return FALSE;
+               }
+
+               ser.custom_divisor = ser.baud_base / baud_rate;
+               ser.flags &= ~ASYNC_SPD_MASK;
+               ser.flags |= ASYNC_SPD_CUST;
+
+               if (ioctl (fd, TIOCSSERIAL, &ser) < 0)
+               {
+                       return FALSE;
+               }
+#elif defined(HAVE_IOKIT)
+               speed_t speed = baud_rate;
+               if (ioctl(fd, IOSSIOSPEED, &speed) == -1)
+                       return FALSE;
+#else
+               /* Don't know how to set custom baud rate on this platform. */
                return FALSE;
+#endif
        }
-       else
-       {
+
        return TRUE;
-       }
 }