Add ifndef guards to all header files

Author: Matthew West

source/c_adc.h

@@ -21,8 +21,12 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
 
+#ifndef BBIO_C_ADC_H
+#define BBIO_C_ADC_H
+
 extern int adc_initialized;
 
 int adc_setup(void);
 int read_value(unsigned int ain, float *value);
-void adc_cleanup(void);
+void adc_cleanup(void);
+#endif

source/c_pwm.h

@@ -20,9 +20,12 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
+#ifndef C_PWM_H
+#define C_PWM_H
 
 int pwm_start(const char *key, float duty, float freq, int polarity);
 int pwm_disable(const char *key);
 int pwm_set_frequency(const char *key, float freq);
 int pwm_set_duty_cycle(const char *key, float duty);
-void pwm_cleanup(void);
+void pwm_cleanup(void);
+#endif

source/c_uart.h

@@ -20,6 +20,8 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
-
+#ifndef C_UART_H
+#define C_UART_H
 int uart_setup(const char *dt);
-void uart_cleanup(void);
+void uart_cleanup(void);
+#endif

source/common.h

@@ -28,6 +28,9 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
 
+#ifndef COMMON_H
+#define COMMON_H
+
 #define MODE_UNKNOWN -1
 #define BOARD        10
 #define BCM          11
@@ -57,3 +60,5 @@ int load_device_tree(const char *name);
 int unload_device_tree(const char *name);
 int setup_error;
 int module_setup;
+
+#endif

source/constants.h

@@ -1,3 +1,6 @@
+#ifndef CONSTANTS_H
+#define CONSTANTS_H
+
 PyObject *high;
 PyObject *low;
 PyObject *input;
@@ -11,4 +14,6 @@ PyObject *falling_edge;
 PyObject *both_edge;
 PyObject *version;
 
-void define_constants(PyObject *module);
+void define_constants(PyObject *module);
+
+#endif

source/event_gpio.h

@@ -27,6 +27,8 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
+#ifndef EVENT_GPIO_H
+#define EVENT_GPIO_H
 
 #define NO_EDGE      0
 #define RISING_EDGE  1
@@ -67,3 +69,5 @@ int gpio_is_evented(unsigned int gpio);
 int event_initialise(void);
 void event_cleanup(void);
 int blocking_wait_for_edge(unsigned int gpio, unsigned int edge);
+
+#endif