void saygoodbye(void)
{
unsigned iodata[512/4];
struct binder_io msg, reply;
/* 构造binder_io */
bio_init(&msg, iodata, sizeof(iodata), 4);
bio_put_uint32(&msg, 0); // strict mode header
/* 放入参数 */
/* 调用binder_call */
if (binder_call(g_bs, &msg, &reply, g_goodbye_handle, GOODBYE_SVR_CMD_SAYGOODBYE))
return ;
/* 从reply中解析出返回值 */
binder_done(g_bs, &msg, &reply);
}
int svcmgr_publish(struct binder_state *bs, uint32_t target,
const char *name, void *ptr)
{
int status;
unsigned iodata[512/4];
struct binder_io msg, reply;
bio_init(&msg, iodata, sizeof(iodata), 4);
bio_put_uint32(&msg, 0); // strict mode header
bio_put_string16_x(&msg, SVC_MGR_NAME);
bio_put_string16_x(&msg, name);
bio_put_obj(&msg, ptr);
if (binder_call(bs, &msg, &reply, target, SVC_MGR_ADD_SERVICE))
return -1;
status = bio_get_uint32(&reply);
binder_done(bs, &msg, &reply);
return status;
}
uint32_t svcmgr_lookup(struct binder_state *bs, uint32_t target, const char *name)
{
uint32_t handle;
unsigned iodata[512/4];
struct binder_io msg, reply;
bio_init(&msg, iodata, sizeof(iodata), 4);
bio_put_uint32(&msg, 0); // strict mode header
bio_put_string16_x(&msg, SVC_MGR_NAME);
bio_put_string16_x(&msg, name);
if (binder_call(bs, &msg, &reply, target, SVC_MGR_CHECK_SERVICE))
return 0;
handle = bio_get_ref(&reply);
if (handle)
binder_acquire(bs, handle);
binder_done(bs, &msg, &reply);
return handle;
}
static uint32_t get_handle_from_svcmgr(const uint16_t *str, binder_state *bs){
struct binder_io msg;
struct binder_io reply;
unsigned rdata[256];
int res;
uint32_t ref;
bio_init(&msg, rdata, sizeof(rdata), 0);
bio_put_string16(&msg, svcmgr_id);
bio_put_string16(&msg, str);
res = binder_call(bs, &msg, &reply, 0,
BINDER_SERVICE_MANAGER, SVC_MGR_GET_SERVICE);
if (res == -1)
return res;
ref = bio_get_ref(&reply);
if (ref == 0)
return -1;
return ref;
}
void get_all_handles(struct binder_state *bs) {
struct binder_io msg;
struct binder_io reply;
unsigned rdata[256];
uint16_t *str;
int res;
size_t sz;
unsigned service_count = 0;
uint32_t handle;
do {
bio_init(&msg, rdata, sizeof(rdata), 0);
bio_put_string16(&msg, svcmgr_id);
/* put the cmd */
bio_put_uint32(&msg, service_count);
res = binder_call(bs, &msg, &reply,
BINDER_SERVICE_MANAGER, SVC_MGR_LIST_SERVICES);
if (res) {
str = bio_get_string16(&reply, &sz);
si = malloc((sz + 1) * sizeof(uint16_t));
if (!si) {
fprintf(stderr, "malloc failed\n");
res = -1;
break;
}
si[sz] = '/0';
services[service_count] = si;
handle = get_handle_from_svcmgr(str, sz);
if (handle == -1) {
free(si);
break;
}
handles[service_count] = handle;
service_count++;
}
} while(res != -1 && service_count < MAX_SERVICES);
num_handles_set = service_count;
}
int sayhello_to(char * name)
{
unsigned iodata[512/4];
struct binder_io msg, reply;
int ret;
/* 构造binder_io */
bio_init(&msg, iodata, sizeof(iodata), 4);
bio_put_uint32(&msg, 0); // strict mode header
/* 放入参数 */
bio_put_string16_x(&msg, name);
/* 调用binder_call */
if (binder_call(g_bs, &msg, &reply, g_hello_handle, HELLO_SVR_CMD_SAYHELLO_TO))
return 0;
/* 从reply中解析出返回值 */
ret = bio_get_uint32(&reply);
binder_done(g_bs, &msg, &reply);
return ret;
}
// binder_call의 래퍼를 제공합니다. 안드로이드에서는 transact 함수를 사용합니다.
int transact(int handle, int code, int* msg, int* reply) {
return binder_call(mProcess->get_driver(), msg, reply, handle, code);
}
