binder.h revision bcf38880c65297da58194eb0c0ce8d6e2bab7d94
1/* Copyright 2008 The Android Open Source Project 2 */ 3 4#ifndef _BINDER_H_ 5#define _BINDER_H_ 6 7#include <sys/ioctl.h> 8#include <linux/binder.h> 9 10struct binder_state; 11 12struct binder_io 13{ 14 char *data; /* pointer to read/write from */ 15 uint32_t *offs; /* array of offsets */ 16 uint32_t data_avail; /* bytes available in data buffer */ 17 uint32_t offs_avail; /* entries available in offsets array */ 18 19 char *data0; /* start of data buffer */ 20 uint32_t *offs0; /* start of offsets buffer */ 21 uint32_t flags; 22 uint32_t unused; 23}; 24 25struct binder_death { 26 void (*func)(struct binder_state *bs, void *ptr); 27 void *ptr; 28}; 29 30/* the one magic object */ 31#define BINDER_SERVICE_MANAGER ((void*) 0) 32 33#define SVC_MGR_NAME "android.os.IServiceManager" 34 35enum { 36 SVC_MGR_GET_SERVICE = 1, 37 SVC_MGR_CHECK_SERVICE, 38 SVC_MGR_ADD_SERVICE, 39 SVC_MGR_LIST_SERVICES, 40}; 41 42typedef int (*binder_handler)(struct binder_state *bs, 43 struct binder_transaction_data *txn, 44 struct binder_io *msg, 45 struct binder_io *reply); 46 47struct binder_state *binder_open(unsigned mapsize); 48void binder_close(struct binder_state *bs); 49 50/* initiate a blocking binder call 51 * - returns zero on success 52 */ 53int binder_call(struct binder_state *bs, 54 struct binder_io *msg, struct binder_io *reply, 55 void *target, uint32_t code); 56 57/* release any state associate with the binder_io 58 * - call once any necessary data has been extracted from the 59 * binder_io after binder_call() returns 60 * - can safely be called even if binder_call() fails 61 */ 62void binder_done(struct binder_state *bs, 63 struct binder_io *msg, struct binder_io *reply); 64 65/* manipulate strong references */ 66void binder_acquire(struct binder_state *bs, void *ptr); 67void binder_release(struct binder_state *bs, void *ptr); 68 69void binder_link_to_death(struct binder_state *bs, void *ptr, struct binder_death *death); 70 71void binder_loop(struct binder_state *bs, binder_handler func); 72 73int binder_become_context_manager(struct binder_state *bs); 74 75/* allocate a binder_io, providing a stack-allocated working 76 * buffer, size of the working buffer, and how many object 77 * offset entries to reserve from the buffer 78 */ 79void bio_init(struct binder_io *bio, void *data, 80 uint32_t maxdata, uint32_t maxobjects); 81 82void bio_destroy(struct binder_io *bio); 83 84void bio_put_obj(struct binder_io *bio, void *ptr); 85void bio_put_ref(struct binder_io *bio, void *ptr); 86void bio_put_uint32(struct binder_io *bio, uint32_t n); 87void bio_put_string16(struct binder_io *bio, const uint16_t *str); 88void bio_put_string16_x(struct binder_io *bio, const char *_str); 89 90uint32_t bio_get_uint32(struct binder_io *bio); 91uint16_t *bio_get_string16(struct binder_io *bio, uint32_t *sz); 92void *bio_get_obj(struct binder_io *bio); 93void *bio_get_ref(struct binder_io *bio); 94 95#endif 96