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author | Jakob Odersky <jodersky@gmail.com> | 2014-01-13 17:40:34 +0100 |
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committer | Jakob Odersky <jodersky@gmail.com> | 2014-01-14 15:43:00 +0100 |
commit | 5c94ee017051d51f51e06a61a8bc4e70a15e36da (patch) | |
tree | 2e48701ebb4177557234dbbd22b3b7058cad36de /flow-native/unix | |
parent | 84f640208ed6e4e155e87ebcb73a82c021174ea7 (diff) | |
download | akka-serial-5c94ee017051d51f51e06a61a8bc4e70a15e36da.tar.gz akka-serial-5c94ee017051d51f51e06a61a8bc4e70a15e36da.tar.bz2 akka-serial-5c94ee017051d51f51e06a61a8bc4e70a15e36da.zip |
enable easier cross-compilation
Diffstat (limited to 'flow-native/unix')
-rw-r--r-- | flow-native/unix/src/flow.c | 312 |
1 files changed, 0 insertions, 312 deletions
diff --git a/flow-native/unix/src/flow.c b/flow-native/unix/src/flow.c deleted file mode 100644 index caf7b9b..0000000 --- a/flow-native/unix/src/flow.c +++ /dev/null @@ -1,312 +0,0 @@ -#include <stdlib.h> -#include <stdio.h> -#include <unistd.h> -#include <errno.h> -#include <termios.h> -#include <fcntl.h> -#include "com_github_jodersky_flow_internal_NativeSerial.h" -#include "flow.h" - -static bool debug = false; -#define DEBUG(f) if (debug) {f} - -void serial_debug(bool value) { - debug = value; -} - -//contains file descriptors used in managing a serial port -struct serial_config { - - int port_fd; // file descriptor of serial port - - /* a pipe is used to abort a serial read by writing something into the - * write end of the pipe */ - int pipe_read_fd; // file descriptor, read end of pipe - int pipe_write_fd; // file descriptor, write end of pipe - -}; - -int serial_open( - const char* port_name, - int baud, - int char_size, - bool two_stop_bits, - int parity, - struct serial_config** serial) { - - int fd = open(port_name, O_RDWR | O_NOCTTY | O_NONBLOCK); - - if (fd < 0) { - int en = errno; - DEBUG(perror("obtain file descriptor");); - if (en == EACCES) return E_ACCESS_DENIED; - if (en == ENOENT) return E_NO_PORT; - return E_IO; - } - - if (flock(fd, LOCK_EX | LOCK_NB) < 0) { - DEBUG(perror("acquire lock on port");); - close(fd); - return E_BUSY; - } - - /* configure new port settings */ - struct termios newtio; - - /* following calls correspond to makeraw() */ - newtio.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON); - newtio.c_oflag &= ~OPOST; - newtio.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN); - newtio.c_cflag &= ~(CSIZE | PARENB); - - /* set speed */ - speed_t bd; - switch (baud) { - case 50: bd = B50; break; - case 75: bd = B75; break; - case 110: bd = B110; break; - case 134: bd = B134; break; - case 150: bd = B150; break; - case 200: bd = B200; break; - case 300: bd = B300; break; - case 600: bd = B600; break; - case 1200: bd = B1200; break; - case 1800: bd = B1800; break; - case 2400: bd = B2400; break; - case 4800: bd = B4800; break; - case 9600: bd = B9600; break; - case 19200: bd = B19200; break; - case 38400: bd = B38400; break; - case 57600: bd = B57600; break; - case 115200: bd = B115200; break; - case 230400: bd = B230400; break; - default: - close(fd); - return E_INVALID_SETTINGS; - } - - if (cfsetspeed(&newtio, bd) < 0) { - DEBUG(perror("set baud rate");); - close(fd); - return E_IO; - } - - /* set char size*/ - switch (char_size) { - case 5: newtio.c_cflag |= CS5; break; - case 6: newtio.c_cflag |= CS6; break; - case 7: newtio.c_cflag |= CS7; break; - case 8: newtio.c_cflag |= CS8; break; - default: - close(fd); - return E_INVALID_SETTINGS; - } - - /* use two stop bits */ - if (two_stop_bits){ - newtio.c_cflag |= CSTOPB; - } - - /* set parity */ - switch (parity) { - case PARITY_NONE: break; - case PARITY_ODD: newtio.c_cflag |= (PARENB | PARODD); break; - case PARITY_EVEN: newtio.c_cflag |= PARENB; break; - default: - close(fd); - return E_INVALID_SETTINGS; - } - - if (tcflush(fd, TCIOFLUSH) < 0) { - DEBUG(perror("flush serial settings");); - close(fd); - return E_IO; - } - - if (tcsetattr(fd, TCSANOW, &newtio) < 0) { - DEBUG(perror("apply serial settings");); - close(fd); - return E_IO; - } - - int pipe_fd[2]; - if (pipe(pipe_fd) < 0) { - DEBUG(perror("open pipe");); - close(fd); - return E_IO; - } - - if (fcntl(pipe_fd[0], F_SETFL, O_NONBLOCK) < 0 || fcntl(pipe_fd[1], F_SETFL, O_NONBLOCK) < 0) { - DEBUG(perror("make pipe non-blocking");); - close(fd); - return E_IO; - } - - struct serial_config* s = malloc(sizeof(s)); - if (s == NULL) { - DEBUG(perror("allocate memory for serial configuration");); - close(fd); - close(pipe_fd[0]); - close(pipe_fd[1]); - return E_IO; - } - - s->port_fd = fd; - s->pipe_read_fd = pipe_fd[0]; - s->pipe_write_fd = pipe_fd[1]; - (*serial) = s; - - return 0; -} - -int serial_close(struct serial_config* serial) { - if (close(serial->pipe_write_fd) < 0) { - DEBUG(perror("close write end of pipe");); - return E_IO; - } - if (close(serial->pipe_read_fd) < 0) { - DEBUG(perror("close read end of pipe");); - return E_IO; - } - - if (flock(serial->port_fd, LOCK_UN) < 0){ - DEBUG(perror("release lock on port");); - return E_IO; - } - if (close(serial->port_fd) < 0) { - DEBUG(perror("close port");); - return E_IO; - } - - free(serial); - return 0; -} - -int serial_read(struct serial_config* serial, unsigned char* buffer, size_t size) { - int port = serial->port_fd; - int pipe = serial->pipe_read_fd; - - fd_set rfds; - FD_ZERO(&rfds); - FD_SET(port, &rfds); - FD_SET(pipe, &rfds); - - int nfds = pipe + 1; - if (pipe < port) nfds = port + 1; - - int n = select(nfds, &rfds, NULL, NULL, NULL); - if (n < 0) { - DEBUG(perror("select");); - return E_IO; - } - - if (FD_ISSET(port, &rfds)) { - int r = read(port, buffer, size); - - //treat 0 bytes read as an error to avoid problems on disconnect - //anyway, after a poll there should be more than 0 bytes available to read - if (r <= 0) { - DEBUG(perror("read");); - return E_IO; - } - return r; - } else if (FD_ISSET(pipe, &rfds)) { - return E_INTERRUPT; - } else { - fputs("select: unknown read sets", stderr); - return E_IO; - } -} - -int serial_write(struct serial_config* serial, unsigned char* data, size_t size) { - int r = write(serial->port_fd, data, size); - if (r < 0) { - DEBUG(perror("write");); - return E_IO; - } - return r; -} - -int serial_interrupt(struct serial_config* serial) { - int data = 0xffffffff; - - //write to pipe to wake up any blocked read thread (self-pipe trick) - if (write(serial->pipe_write_fd, &data, 1) < 0) { - DEBUG(perror("write to pipe for interrupt");); - return E_IO; - } - - return 0; -} - - -// JNI bindings -// ============ - -inline struct serial_config* j2s(jlong pointer) { - return (struct serial_config*) pointer; -} - -inline jlong s2j(struct serial_config* pointer) { - return (jlong) pointer; -} - -JNIEXPORT jint JNICALL Java_com_github_jodersky_flow_internal_NativeSerial_open - (JNIEnv *env, jclass clazz, jstring port_name, jint baud, jint char_size, jboolean two_stop_bits, jint parity, jlongArray jserialp) -{ - const char *dev = (*env)->GetStringUTFChars(env, port_name, 0); - struct serial_config* serial; - int r = serial_open(dev, baud, char_size, two_stop_bits, parity, &serial); - (*env)->ReleaseStringUTFChars(env, port_name, dev); - - long serialp = s2j(serial); - (*env)->SetLongArrayRegion(env, jserialp, 0, 1, &serialp); - - return r; -} - -JNIEXPORT jint JNICALL Java_com_github_jodersky_flow_internal_NativeSerial_close - (JNIEnv * env, jclass clazz, jlong serial) -{ - serial_close(j2s(serial)); -} - -JNIEXPORT jint JNICALL Java_com_github_jodersky_flow_internal_NativeSerial_read - (JNIEnv * env, jclass clazz, jlong serial, jbyteArray jbuffer) -{ - - jsize size = (*env)->GetArrayLength(env, jbuffer); - - unsigned char buffer[size]; - int n = serial_read(j2s(serial), buffer, size); - if (n < 0) { - return n; - } - - (*env)->SetByteArrayRegion(env, jbuffer, 0, n, (signed char *) buffer); - return n; -} - -JNIEXPORT jint JNICALL Java_com_github_jodersky_flow_internal_NativeSerial_write - (JNIEnv * env, jclass clazz, jlong serial, jbyteArray jbuffer) -{ - unsigned char * buffer = (*env)->GetByteArrayElements(env, jbuffer, NULL); - int size = (*env)->GetArrayLength(env, jbuffer); - int r = serial_write(j2s(serial), buffer, size); - - (*env)->ReleaseByteArrayElements(env, jbuffer, buffer, JNI_ABORT); - - return r; -} - -JNIEXPORT jint JNICALL Java_com_github_jodersky_flow_internal_NativeSerial_interrupt - (JNIEnv * env, jclass clazz, jlong serial) -{ - return serial_interrupt(j2s(serial)); -} - -JNIEXPORT void JNICALL Java_com_github_jodersky_flow_internal_NativeSerial_debug - (JNIEnv *env, jclass clazz, jboolean value) -{ - serial_debug((bool) value); -} |