corrected include guards, changed GpioIF prototype

linux/gpio/gpioDefinitions.h

@@ -0,0 +1,46 @@
+#ifndef LINUX_GPIO_GPIODEFINITIONS_H_
+#define LINUX_GPIO_GPIODEFINITIONS_H_
+
+#include <string>
+#include <unordered_map>
+
+using gpioId_t = uint16_t;
+
+namespace gpio {
+enum Direction {
+    IN = 0,
+    OUT = 1
+};
+}
+
+/**
+ * @brief   Struct containing information about the GPIO to use. This is
+ *          required by the libgpiod to access and drive a GPIO.
+ * @param chipname      String of the chipname specifying the group which contains the GPIO to
+ *                      access. E.g. gpiochip0. To detect names of GPIO groups run gpiodetect on
+ *                      the linux command line.
+ * @param lineNum       The offset of the GPIO within the GPIO group.
+ * @param consumer      Name of the consumer. Simply a description of the GPIO configuration.
+ * @param direction     Specifies whether the GPIO should be used as in- or output.
+ * @param initValue     Defines the initial state of the GPIO when configured as output.
+ *                      Only required for output GPIOs.
+ * @param lineHandle    The handle returned by gpiod_chip_get_line will be later written to this
+ *                      pointer.
+ */
+typedef struct GpioConfig {
+    GpioConfig(std::string chipname_, int lineNum_, std::string consumer_,
+            gpio::Direction direction_, int initValue_):
+            chipname(chipname_), lineNum(lineNum_), consumer(consumer_),
+            direction(direction_), initValue(initValue_) {}
+    std::string chipname;
+    int lineNum;
+    std::string consumer;
+    gpio::Direction direction;
+    int initValue;
+    struct gpiod_line* lineHandle = nullptr;
+} GpioConfig_t;
+
+using GpioMap = std::unordered_map<gpioId_t, GpioConfig_t>;
+using GpioMapIter = GpioMap::iterator;
+
+#endif /* LINUX_GPIO_GPIODEFINITIONS_H_ */