最近在學習android HAL 層 ~ 離不開這三個數據結構~~先貼出來

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typedef struct hw_module_t {
??? /** tag must be initialized to HARDWARE_MODULE_TAG */
??? uint32_t tag;

??? /** major version number for the module */
??? uint16_t version_major;

??? /** minor version number of the module */
??? uint16_t version_minor;

??? /** Identifier of module */
??? const char *id;

??? /** Name of this module */
??? const char *name;

??? /** Author/owner/implementor of the module */
??? const char *author;

??? /** Modules methods */
??? struct hw_module_methods_t* methods;

??? /** module's dso */
??? void* dso;

??? /** padding to 128 bytes, reserved for future use */
??? uint32_t reserved[32-7];

} hw_module_t;

typedef struct hw_module_methods_t {
??? /** Open a specific device */
??? int (*open)(const struct hw_module_t* module, const char* id,
??????????? struct hw_device_t** device);

} hw_module_methods_t;

/**
?* Every device data structure must begin with hw_device_t
?* followed by module specific public methods and attributes.
?*/
typedef struct hw_device_t {
??? /** tag must be initialized to HARDWARE_DEVICE_TAG */
??? uint32_t tag;

??? /** version number for hw_device_t */
??? uint32_t version;

??? /** reference to the module this device belongs to */
??? struct hw_module_t* module;

??? /** padding reserved for future use */
??? uint32_t reserved[12];

??? /** Close this device */
??? int (*close)(struct hw_device_t* device);

} hw_device_t;

轉載于:https://www.cnblogs.com/six-string/archive/2012/05/29/2524213.html

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