diff options
| -rw-r--r-- | include/hardware/hardware.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/hardware/hardware.h b/include/hardware/hardware.h index 3d341c8..67ba9f1 100644 --- a/include/hardware/hardware.h +++ b/include/hardware/hardware.h @@ -34,6 +34,29 @@ __BEGIN_DECLS #define HARDWARE_MODULE_TAG MAKE_TAG_CONSTANT('H', 'W', 'M', 'T') #define HARDWARE_DEVICE_TAG MAKE_TAG_CONSTANT('H', 'W', 'D', 'T') +#define HARDWARE_MAKE_API_VERSION(maj,min) \ + ((((maj) & 0xff) << 8) | ((min) & 0xff)) + +/* + * The current HAL API version. + * + * All module implementations must set the hw_module_t.hal_api_version field + * to this value when declaring the module with HAL_MODULE_INFO_SYM. + * + * Note that previous implementations have always set this field to 0. + * Therefore, libhardware HAL API will always consider versions 0.0 and 1.0 + * to be 100% binary compatible. + * + */ +#define HARDWARE_HAL_API_VERSION HARDWARE_MAKE_API_VERSION(1, 0) + +/* + * Helper macro for module implementors. + * + * Use this macro to set the hw_module_t.module_api_version field. + */ +#define HARDWARE_MODULE_API_VERSION(maj,min) HARDWARE_MAKE_API_VERSION(maj,min) + struct hw_module_t; struct hw_module_methods_t; struct hw_device_t; |