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Sensors: Use a native_handle for the data channel instead of a single file descriptor.

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This eliminates the requirement that all sensors share a single file descriptor.
This, along with concurrent changes in other projects, fixes bugs b/1614524 and b/1614481

Signed-off-by: Mike Lockwood <lockwood@android.com>
This commit is contained in:
Mike Lockwood
2009-05-22 10:05:48 -04:00
parent 465cf474be
commit 21b652f933
1 changed files with 9 additions and 8 deletions
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17
include/hardware/sensors.h
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@@ -22,6 +22,7 @@
#include <sys/types.h> #include <sys/types.h>
#include <hardware/hardware.h> #include <hardware/hardware.h>
#include <cutils/native_handle.h>
__BEGIN_DECLS __BEGIN_DECLS
@@ -278,14 +279,14 @@ struct sensors_control_device_t {
struct hw_device_t common; struct hw_device_t common;
/** /**
* Returns the fd which will be the parameter to * Returns a native_handle_t, which will be the parameter to
* sensors_data_device_t::open_data(). * sensors_data_device_t::open_data().
* The caller takes ownership of this fd. This is intended to be * The caller takes ownership of this handle. This is intended to be
* passed cross processes. * passed cross processes.
* *
* @return a fd if successful, < 0 on error * @return a native_handle_t if successful, < 0 on error
*/ */
int (*open_data_source)(struct sensors_control_device_t *dev); native_handle_t* (*open_data_source)(struct sensors_control_device_t *dev);
/** Activate/deactivate one sensor. /** Activate/deactivate one sensor.
* *
@@ -316,15 +317,15 @@ struct sensors_data_device_t {
/** /**
* Prepare to read sensor data. * Prepare to read sensor data.
* *
* This routine does NOT take ownership of the fd * This routine does NOT take ownership of the handle
* and must not close it. Typically this routine would * and must not close it. Typically this routine would
* use a duplicate of the fd parameter. * use a duplicate of the nh parameter.
* *
* @param fd from sensors_control_open. * @param nh from sensors_control_open.
* *
* @return 0 if successful, < 0 on error * @return 0 if successful, < 0 on error
*/ */
int (*data_open)(struct sensors_data_device_t *dev, int fd); int (*data_open)(struct sensors_data_device_t *dev, native_handle_t* nh);
/** /**
* Caller has completed using the sensor data. * Caller has completed using the sensor data.