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 10 struct binder_state; 11 12 struct binder_object 13 { 14 uint32_t type; 15 uint32_t flags; 16 void *pointer; 17 void *cookie; 18 }; 19 20 struct binder_txn 21 { 22 void *target; 23 void *cookie; 24 uint32_t code; 25 uint32_t flags; 26 27 uint32_t sender_pid; 28 uint32_t sender_euid; 29 30 uint32_t data_size; 31 uint32_t offs_size; 32 void *data; 33 void *offs; 34 }; 35 36 struct binder_io 37 { 38 char *data; /* pointer to read/write from */ 39 uint32_t *offs; /* array of offsets */ 40 uint32_t data_avail; /* bytes available in data buffer */ 41 uint32_t offs_avail; /* entries available in offsets array */ 42 43 char *data0; /* start of data buffer */ 44 uint32_t *offs0; /* start of offsets buffer */ 45 uint32_t flags; 46 uint32_t unused; 47 }; 48 49 struct binder_death { 50 void (*func)(struct binder_state *bs, void *ptr); 51 void *ptr; 52 }; 53 54 /* the one magic object */ 55 #define BINDER_SERVICE_MANAGER ((void*) 0) 56 57 #define SVC_MGR_NAME "android.os.IServiceManager" 58 59 enum { 60 SVC_MGR_GET_SERVICE = 1, 61 SVC_MGR_CHECK_SERVICE, 62 SVC_MGR_ADD_SERVICE, 63 SVC_MGR_LIST_SERVICES, 64 }; 65 66 typedef int (*binder_handler)(struct binder_state *bs, 67 struct binder_txn *txn, 68 struct binder_io *msg, 69 struct binder_io *reply); 70 71 struct binder_state *binder_open(unsigned mapsize); 72 void binder_close(struct binder_state *bs); 73 74 /* initiate a blocking binder call 75 * - returns zero on success 76 */ 77 int binder_call(struct binder_state *bs, 78 struct binder_io *msg, struct binder_io *reply, 79 void *target, uint32_t code); 80 81 /* release any state associate with the binder_io 82 * - call once any necessary data has been extracted from the 83 * binder_io after binder_call() returns 84 * - can safely be called even if binder_call() fails 85 */ 86 void binder_done(struct binder_state *bs, 87 struct binder_io *msg, struct binder_io *reply); 88 89 /* manipulate strong references */ 90 void binder_acquire(struct binder_state *bs, void *ptr); 91 void binder_release(struct binder_state *bs, void *ptr); 92 93 void binder_link_to_death(struct binder_state *bs, void *ptr, struct binder_death *death); 94 95 void binder_loop(struct binder_state *bs, binder_handler func); 96 97 int binder_become_context_manager(struct binder_state *bs); 98 99 /* allocate a binder_io, providing a stack-allocated working 100 * buffer, size of the working buffer, and how many object 101 * offset entries to reserve from the buffer 102 */ 103 void bio_init(struct binder_io *bio, void *data, 104 uint32_t maxdata, uint32_t maxobjects); 105 106 void bio_destroy(struct binder_io *bio); 107 108 void bio_put_obj(struct binder_io *bio, void *ptr); 109 void bio_put_ref(struct binder_io *bio, void *ptr); 110 void bio_put_uint32(struct binder_io *bio, uint32_t n); 111 void bio_put_string16(struct binder_io *bio, const uint16_t *str); 112 void bio_put_string16_x(struct binder_io *bio, const char *_str); 113 114 uint32_t bio_get_uint32(struct binder_io *bio); 115 uint16_t *bio_get_string16(struct binder_io *bio, uint32_t *sz); 116 void *bio_get_obj(struct binder_io *bio); 117 void *bio_get_ref(struct binder_io *bio); 118 119 #endif 120
