gpio: enable very basic gpio control from swig

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

src/CMakeLists.txt

@@ -7,7 +7,7 @@ set (maa_LIB_SRCS
   ${PROJECT_SOURCE_DIR}/src/maa.cxx
   ${PROJECT_SOURCE_DIR}/src/i2c/i2c.cxx
   ${PROJECT_SOURCE_DIR}/src/i2c/smbus.c
-  ${PROJECT_SOURCE_DIR}/src/gpio/gpio.cxx
+  ${PROJECT_SOURCE_DIR}/src/gpio/gpio.c
 )
 
 add_library (maa STATIC ${maa_LIB_SRCS})

src/gpio/gpio.c

@@ -24,17 +24,21 @@
  */
 
 #include <stdlib.h>
+#include <stdio.h>
+
 #include "gpio.h"
 
-using namespace maa;
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 void
 gpio_init(gpio_t *gpio, int pin) {
-    malloc(sizeof(gpio_t));
     gpio->pin = pin;
 }
+
 int
-gpio_set(gpio_t *gpio) {
+gpio_set(int pin) {
     //Stuff
     return 0;
 }
@@ -43,16 +47,22 @@ void
 gpio_mode(gpio_t *gpio, gpio_mode_t mode) {
     //gpio->pin
 }
+
 void
 gpio_dir(gpio_t *gpio, gpio_dir_t dir) {
 
 }
+
 int
 gpio_read(gpio_t *gpio) {
     return 0;
 }
+
 void
 gpio_write(gpio_t *gpio, int value){
 
 }
 
+#ifdef __cplusplus
+}
+#endif

src/maa.i

@@ -4,3 +4,4 @@
 
 %include "maa.h"
 %include "i2c.h"
+%include "gpio.h"