adb: convert more stuff to unique_fd.

Test: adb_test
Test: adbd_test
Test: test_device.py
Change-Id: Ie75f0b811d2c75d508e6ecffb40579308f5789d0
diff --git a/adb/services.cpp b/adb/services.cpp
index 73fed09..0061f0e 100644
--- a/adb/services.cpp
+++ b/adb/services.cpp
@@ -71,7 +71,7 @@
     return unique_fd(s[0]);
 }
 
-int service_to_fd(std::string_view name, atransport* transport) {
+unique_fd service_to_fd(std::string_view name, atransport* transport) {
     unique_fd ret;
 
     if (is_socket_spec(name)) {
@@ -86,9 +86,9 @@
     }
 
     if (ret >= 0) {
-        close_on_exec(ret);
+        close_on_exec(ret.get());
     }
-    return ret.release();
+    return ret;
 }
 
 #if ADB_HOST
@@ -99,9 +99,7 @@
     ConnectionState state;
 };
 
-static void wait_for_state(int fd, void* data) {
-    std::unique_ptr<state_info> sinfo(reinterpret_cast<state_info*>(data));
-
+static void wait_for_state(int fd, state_info* sinfo) {
     D("wait_for_state %d", sinfo->state);
 
     while (true) {
@@ -197,7 +195,7 @@
     } else if (android::base::StartsWith(name, "wait-for-")) {
         name += strlen("wait-for-");
 
-        std::unique_ptr<state_info> sinfo = std::make_unique<state_info>();
+        std::shared_ptr<state_info> sinfo = std::make_shared<state_info>();
         if (sinfo == nullptr) {
             fprintf(stderr, "couldn't allocate state_info: %s", strerror(errno));
             return nullptr;
@@ -233,19 +231,15 @@
             return nullptr;
         }
 
-        int fd = create_service_thread(
-                         "wait", std::bind(wait_for_state, std::placeholders::_1, sinfo.get()))
-                         .release();
-        if (fd != -1) {
-            sinfo.release();
-        }
-        return create_local_socket(fd);
+        unique_fd fd = create_service_thread("wait", [sinfo](int fd) {
+            wait_for_state(fd, sinfo.get());
+        });
+        return create_local_socket(std::move(fd));
     } else if (!strncmp(name, "connect:", 8)) {
         std::string host(name + strlen("connect:"));
-        int fd = create_service_thread("connect",
-                                       std::bind(connect_service, std::placeholders::_1, host))
-                         .release();
-        return create_local_socket(fd);
+        unique_fd fd = create_service_thread(
+                "connect", std::bind(connect_service, std::placeholders::_1, host));
+        return create_local_socket(std::move(fd));
     }
     return nullptr;
 }