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https://github.com/subsurface/subsurface.git
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core: convert ftdi.c to C++
Replace malloc/free of one structure by C++ idioms and add a destructor to the struct. Otherwise, don't touch the code. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger
parent
3df1e48094
commit
17b23ddb69
2 changed files with 38 additions and 53 deletions
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@ -17,7 +17,7 @@ elseif(CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
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endif()
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if(FTDISUPPORT)
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set(SERIAL_FTDI serial_ftdi.c)
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set(SERIAL_FTDI serial_ftdi.cpp)
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endif()
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if(BTSUPPORT)
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@ -22,7 +22,7 @@
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* MA 02110-1301 USA
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*/
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#include <stdlib.h> // malloc, free
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#include <memory>
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#include <string.h> // strerror
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#include <errno.h> // errno
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#include <sys/time.h> // gettimeofday
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@ -49,15 +49,15 @@
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#define VID 0x0403 // Vendor ID of FTDI
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typedef struct ftdi_serial_t {
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struct ftdi_serial_t {
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/* Library context. */
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dc_context_t *context;
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dc_context_t *context = nullptr;
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/*
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* The file descriptor corresponding to the serial port.
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* Also a libftdi_ftdi_ctx could be used?
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*/
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struct ftdi_context *ftdi_ctx;
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long timeout;
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struct ftdi_context *ftdi_ctx = nullptr;
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long timeout = -1; // Default to blocking reads.
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/*
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* Serial port settings are saved into this variable immediately
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* after the port is opened. These settings are restored when the
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@ -66,16 +66,21 @@ typedef struct ftdi_serial_t {
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* Custom implementation using libftdi functions could be done.
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*/
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unsigned int baudrate;
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unsigned int nbits;
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unsigned int databits;
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unsigned int stopbits;
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unsigned int parity;
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} ftdi_serial_t;
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// Default to full-duplex.
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unsigned int baudrate = 0;
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unsigned int nbits = 0;
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unsigned int databits = 0;
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unsigned int stopbits = 0;
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unsigned int parity = 0;
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~ftdi_serial_t() {
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if (ftdi_ctx)
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ftdi_free(ftdi_ctx);
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}
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};
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static dc_status_t serial_ftdi_get_available (void *io, size_t *value)
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{
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ftdi_serial_t *device = io;
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ftdi_serial_t *device = (ftdi_serial_t *)io;
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if (device == NULL)
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return DC_STATUS_INVALIDARGS;
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@ -114,7 +119,7 @@ static unsigned int serial_ftdi_get_msec(void)
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static dc_status_t serial_ftdi_sleep (void *io, unsigned int timeout)
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{
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ftdi_serial_t *device = io;
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ftdi_serial_t *device = (ftdi_serial_t *)io;
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if (device == NULL)
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return DC_STATUS_INVALIDARGS;
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@ -173,17 +178,11 @@ static dc_status_t serial_ftdi_open (void **io, dc_context_t *context)
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{
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INFO("serial_ftdi_open called");
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// Allocate memory.
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ftdi_serial_t *device = (ftdi_serial_t *) malloc (sizeof (ftdi_serial_t));
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if (device == NULL) {
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INFO("couldn't allocate memory");
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SYSERROR (errno);
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return DC_STATUS_NOMEMORY;
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}
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auto device = std::make_unique<ftdi_serial_t>();
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INFO("setting up ftdi_ctx");
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struct ftdi_context *ftdi_ctx = ftdi_new();
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if (ftdi_ctx == NULL) {
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INFO("failed ftdi_new()");
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free(device);
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SYSERROR (errno);
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return DC_STATUS_NOMEMORY;
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}
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@ -191,48 +190,34 @@ static dc_status_t serial_ftdi_open (void **io, dc_context_t *context)
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// Library context.
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//device->context = context;
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// Default to blocking reads.
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device->timeout = -1;
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// Default to full-duplex.
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device->baudrate = 0;
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device->nbits = 0;
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device->databits = 0;
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device->stopbits = 0;
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device->parity = 0;
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// Initialize device ftdi context
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INFO("initialize ftdi_ctx");
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ftdi_init(ftdi_ctx);
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if (ftdi_set_interface(ftdi_ctx,INTERFACE_ANY)) {
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free(device);
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ERROR ("%s", ftdi_get_error_string(ftdi_ctx));
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return DC_STATUS_IO;
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}
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INFO("call serial_ftdi_open_device");
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if (serial_ftdi_open_device(ftdi_ctx) < 0) {
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free(device);
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ERROR ("%s", ftdi_get_error_string(ftdi_ctx));
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return DC_STATUS_IO;
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}
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if (ftdi_usb_reset(ftdi_ctx)) {
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free(device);
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ERROR ("%s", ftdi_get_error_string(ftdi_ctx));
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return DC_STATUS_IO;
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}
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if (ftdi_usb_purge_buffers(ftdi_ctx)) {
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free(device);
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ERROR ("%s", ftdi_get_error_string(ftdi_ctx));
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return DC_STATUS_IO;
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}
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device->ftdi_ctx = ftdi_ctx;
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*io = device;
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*io = device.release();
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return DC_STATUS_SUCCESS;
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}
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@ -242,7 +227,7 @@ static dc_status_t serial_ftdi_open (void **io, dc_context_t *context)
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//
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static dc_status_t serial_ftdi_close (void *io)
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{
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ftdi_serial_t *device = io;
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ftdi_serial_t *device = (ftdi_serial_t *)io;
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if (device == NULL)
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return DC_STATUS_SUCCESS;
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@ -254,13 +239,11 @@ static dc_status_t serial_ftdi_close (void *io)
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if (ret < 0) {
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ERROR ("Unable to close the ftdi device : %d (%s)",
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ret, ftdi_get_error_string(device->ftdi_ctx));
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return ret;
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return (dc_status_t)ret;
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}
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ftdi_free(device->ftdi_ctx);
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// Free memory.
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free (device);
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delete device;
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return DC_STATUS_SUCCESS;
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}
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@ -270,7 +253,7 @@ static dc_status_t serial_ftdi_close (void *io)
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//
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static dc_status_t serial_ftdi_configure (void *io, unsigned int baudrate, unsigned int databits, dc_parity_t parity, dc_stopbits_t stopbits, dc_flowcontrol_t flowcontrol)
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{
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ftdi_serial_t *device = io;
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ftdi_serial_t *device = (ftdi_serial_t *)io;
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if (device == NULL)
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return DC_STATUS_INVALIDARGS;
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@ -373,7 +356,7 @@ static dc_status_t serial_ftdi_configure (void *io, unsigned int baudrate, unsig
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//
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static dc_status_t serial_ftdi_set_timeout (void *io, int timeout)
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{
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ftdi_serial_t *device = io;
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ftdi_serial_t *device = (ftdi_serial_t *)io;
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if (device == NULL)
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return DC_STATUS_INVALIDARGS;
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@ -387,7 +370,7 @@ static dc_status_t serial_ftdi_set_timeout (void *io, int timeout)
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static dc_status_t serial_ftdi_read (void *io, void *data, size_t size, size_t *actual)
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{
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ftdi_serial_t *device = io;
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ftdi_serial_t *device = (ftdi_serial_t *)io;
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if (device == NULL)
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return DC_STATUS_INVALIDARGS;
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@ -396,7 +379,7 @@ static dc_status_t serial_ftdi_read (void *io, void *data, size_t size, size_t *
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long timeout = device->timeout;
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// Simulate blocking read as 10s timeout
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if (timeout == -1)
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if (timeout <= -1)
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timeout = 10000;
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unsigned int start_time = serial_ftdi_get_msec();
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@ -409,8 +392,8 @@ static dc_status_t serial_ftdi_read (void *io, void *data, size_t size, size_t *
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ERROR ("%s", ftdi_get_error_string(device->ftdi_ctx));
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return DC_STATUS_IO; //Error during read call.
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} else if (n == 0) {
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if (serial_ftdi_get_msec() - start_time > timeout) {
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ERROR("FTDI read timed out.");
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if (serial_ftdi_get_msec() - start_time > (unsigned int)timeout) {
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ERROR("%s", "FTDI read timed out.");
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return DC_STATUS_TIMEOUT;
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}
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serial_ftdi_sleep (device, 1);
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@ -429,7 +412,7 @@ static dc_status_t serial_ftdi_read (void *io, void *data, size_t size, size_t *
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static dc_status_t serial_ftdi_write (void *io, const void *data, size_t size, size_t *actual)
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{
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ftdi_serial_t *device = io;
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ftdi_serial_t *device = (ftdi_serial_t *)io;
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if (device == NULL)
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return DC_STATUS_INVALIDARGS;
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@ -460,7 +443,7 @@ static dc_status_t serial_ftdi_write (void *io, const void *data, size_t size, s
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static dc_status_t serial_ftdi_purge (void *io, dc_direction_t queue)
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{
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ftdi_serial_t *device = io;
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ftdi_serial_t *device = (ftdi_serial_t *)io;
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if (device == NULL)
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return DC_STATUS_INVALIDARGS;
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@ -497,14 +480,16 @@ static dc_status_t serial_ftdi_purge (void *io, dc_direction_t queue)
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static dc_status_t serial_ftdi_set_break (void *io, unsigned int level)
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{
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ftdi_serial_t *device = io;
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ftdi_serial_t *device = (ftdi_serial_t *)io;
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if (device == NULL)
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return DC_STATUS_INVALIDARGS;
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INFO ("Break: value=%i", level);
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if (ftdi_set_line_property2(device->ftdi_ctx, device->databits, device->stopbits, device->parity, level)) {
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if (ftdi_set_line_property2(device->ftdi_ctx, (ftdi_bits_type)device->databits,
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(ftdi_stopbits_type)device->stopbits, (ftdi_parity_type)device->parity,
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(ftdi_break_type)level)) {
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ERROR ("%s", ftdi_get_error_string(device->ftdi_ctx));
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return DC_STATUS_IO;
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}
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@ -514,7 +499,7 @@ static dc_status_t serial_ftdi_set_break (void *io, unsigned int level)
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static dc_status_t serial_ftdi_set_dtr (void *io, unsigned int value)
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{
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ftdi_serial_t *device = io;
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ftdi_serial_t *device = (ftdi_serial_t *)io;
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if (device == NULL)
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return DC_STATUS_INVALIDARGS;
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@ -531,7 +516,7 @@ static dc_status_t serial_ftdi_set_dtr (void *io, unsigned int value)
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static dc_status_t serial_ftdi_set_rts (void *io, unsigned int level)
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{
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ftdi_serial_t *device = io;
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ftdi_serial_t *device = (ftdi_serial_t *)io;
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if (device == NULL)
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return DC_STATUS_INVALIDARGS;
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