C++ (Cpp) binder_link_to_death Examples

Example #1

File: service_manager.c Project: hujinfan/APP_0003_Binder_C_App

int do_add_service(struct binder_state *bs,
                   const uint16_t *s, size_t len,
                   uint32_t handle, uid_t uid, int allow_isolated,
                   pid_t spid)
{
    struct svcinfo *si;

    //ALOGI("add_service('%s',%x,%s) uid=%d\n", str8(s, len), handle,
    //        allow_isolated ? "allow_isolated" : "!allow_isolated", uid);

    if (!handle || (len == 0) || (len > 127))
        return -1;

    if (!svc_can_register(s, len, spid)) {
        ALOGE("add_service('%s',%x) uid=%d - PERMISSION DENIED\n",
             str8(s, len), handle, uid);
        return -1;
    }

    si = find_svc(s, len);
    if (si) {
        if (si->handle) {
            ALOGE("add_service('%s',%x) uid=%d - ALREADY REGISTERED, OVERRIDE\n",
                 str8(s, len), handle, uid);
            svcinfo_death(bs, si);
        }
        si->handle = handle;
    } else {
        si = malloc(sizeof(*si) + (len + 1) * sizeof(uint16_t));
        if (!si) {
            ALOGE("add_service('%s',%x) uid=%d - OUT OF MEMORY\n",
                 str8(s, len), handle, uid);
            return -1;
        }
        si->handle = handle;
        si->len = len;
        memcpy(si->name, s, (len + 1) * sizeof(uint16_t));
        si->name[len] = '\0';
        si->death.func = (void*) svcinfo_death;
        si->death.ptr = si;
        si->allow_isolated = allow_isolated;
        si->next = svclist;
        svclist = si;
    }
	
    ALOGI("add_service('%s'), handle = %d\n", str8(s, len), handle);

    binder_acquire(bs, handle);
    binder_link_to_death(bs, handle, &si->death);
    return 0;
}

Example #2

File: service_manager.c Project: ybin/android-binder-ipc

// 根据service的name和weak ref创建svcinfo对象并添加到service list中
int do_add_service(struct binder_state *bs,
                   uint16_t *s, unsigned len,
                   void *ptr, unsigned uid, int allow_isolated)
{
    struct svcinfo *si;
    //ALOGI("add_service('%s',%p,%s) uid=%d\n", str8(s), ptr,
    //        allow_isolated ? "allow_isolated" : "!allow_isolated", uid);

    if (!ptr || (len == 0) || (len > 127))
        return -1;

    if (!svc_can_register(uid, s)) {
        ALOGE("add_service('%s',%p) uid=%d - PERMISSION DENIED\n",
             str8(s), ptr, uid);
        return -1;
    }

    si = find_svc(s, len);
    if (si) {
        if (si->ptr) {
            ALOGE("add_service('%s',%p) uid=%d - ALREADY REGISTERED, OVERRIDE\n",
                 str8(s), ptr, uid);
            svcinfo_death(bs, si);
        }
        si->ptr = ptr;
    } else {
        si = malloc(sizeof(*si) + (len + 1) * sizeof(uint16_t));
        if (!si) {
            ALOGE("add_service('%s',%p) uid=%d - OUT OF MEMORY\n",
                 str8(s), ptr, uid);
            return -1;
        }
        si->ptr = ptr;
        si->len = len;
        memcpy(si->name, s, (len + 1) * sizeof(uint16_t));
        si->name[len] = '\0';
        si->death.func = svcinfo_death;
        si->death.ptr = si;
        si->allow_isolated = allow_isolated;
        si->next = svclist;
        svclist = si;
    }

	// 增加弱引用计数
    binder_acquire(bs, ptr);
	// 注册死亡通知
    binder_link_to_death(bs, ptr, &si->death);
    return 0;
}