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gpio: add ownership gaurd

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* Will not unexport if the context did not export it. Can be forced.
* Checks if pin is already exported.

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Thomas Ingleby
2014-05-20 13:51:12 +01:00
committed by Brendan Le Foll
parent 5fa6f50edc
commit 7abd8f5529
3 changed files with 63 additions and 15 deletions
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4
api/gpio.hpp
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@@ -56,11 +56,13 @@ typedef enum {
class Gpio {
public:
Gpio(int pin, bool raw=false) {
Gpio(int pin, bool owner=true, bool raw=false) {
if (raw)
m_gpio = maa_gpio_init_raw(pin);
else
m_gpio = maa_gpio_init(pin);
if (!owner)
maa_gpio_owner(m_gpio, 0);
}
~Gpio() {
maa_result_t x = maa_gpio_close(m_gpio);