Merge pull request #4069 from B3n30/wait_for_service_register

Service::SM: Wait till client is registered

src/core/hle/service/sm/srv.cpp

@@ -3,7 +3,6 @@
 // Refer to the license.txt file included.
 
 #include <tuple>
-
 #include "common/common_types.h"
 #include "common/logging/log.h"
 #include "core/hle/ipc.h"
@@ -11,10 +10,12 @@
 #include "core/hle/kernel/client_port.h"
 #include "core/hle/kernel/client_session.h"
 #include "core/hle/kernel/errors.h"
+#include "core/hle/kernel/event.h"
 #include "core/hle/kernel/hle_ipc.h"
 #include "core/hle/kernel/semaphore.h"
 #include "core/hle/kernel/server_port.h"
 #include "core/hle/kernel/server_session.h"
+#include "core/hle/lock.h"
 #include "core/hle/service/sm/sm.h"
 #include "core/hle/service/sm/srv.h"
 
@@ -99,13 +100,45 @@ void SRV::GetServiceHandle(Kernel::HLERequestContext& ctx) {
 
     // TODO(yuriks): Permission checks go here
 
+    auto get_handle = [name, this](Kernel::SharedPtr<Kernel::Thread> thread,
+                                   Kernel::HLERequestContext& ctx, ThreadWakeupReason reason) {
+        LOG_ERROR(Service_SRV, "called service={} wakeup", name);
+        auto client_port = service_manager->GetServicePort(name);
+
+        auto session = client_port.Unwrap()->Connect();
+        if (session.Succeeded()) {
+            LOG_DEBUG(Service_SRV, "called service={} -> session={}", name,
+                      (*session)->GetObjectId());
+            IPC::RequestBuilder rb(ctx, 0x5, 1, 2);
+            rb.Push(session.Code());
+            rb.PushMoveObjects(std::move(session).Unwrap());
+        } else if (session.Code() == Kernel::ERR_MAX_CONNECTIONS_REACHED) {
+            LOG_ERROR(Service_SRV, "called service={} -> ERR_MAX_CONNECTIONS_REACHED", name);
+            UNREACHABLE();
+        } else {
+            LOG_ERROR(Service_SRV, "called service={} -> error 0x{:08X}", name, session.Code().raw);
+            IPC::RequestBuilder rb(ctx, 0x5, 1, 0);
+            rb.Push(session.Code());
+        }
+    };
+
     auto client_port = service_manager->GetServicePort(name);
     if (client_port.Failed()) {
+        if (wait_until_available && client_port.Code() == ERR_SERVICE_NOT_REGISTERED) {
+            LOG_INFO(Service_SRV, "called service={} delayed", name);
+            Kernel::SharedPtr<Kernel::Event> get_service_handle_event =
+                ctx.SleepClientThread(Kernel::GetCurrentThread(), "GetServiceHandle",
+                                      std::chrono::nanoseconds(-1), get_handle);
+            get_service_handle_delayed_map[name] = std::move(get_service_handle_event);
+            return;
+        } else {
             IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
             rb.Push(client_port.Code());
-        LOG_ERROR(Service_SRV, "called service={} -> error 0x{:08X}", name, client_port.Code().raw);
+            LOG_ERROR(Service_SRV, "called service={} -> error 0x{:08X}", name,
+                      client_port.Code().raw);
             return;
         }
+    }
 
     auto session = client_port.Unwrap()->Connect();
     if (session.Succeeded()) {
@@ -199,6 +232,12 @@ void SRV::RegisterService(Kernel::HLERequestContext& ctx) {
         return;
     }
 
+    auto it = get_service_handle_delayed_map.find(name);
+    if (it != get_service_handle_delayed_map.end()) {
+        it->second->Signal();
+        get_service_handle_delayed_map.erase(it);
+    }
+
     IPC::RequestBuilder rb = rp.MakeBuilder(1, 2);
     rb.Push(RESULT_SUCCESS);
     rb.PushMoveObjects(port.Unwrap());

src/core/hle/service/sm/srv.h

@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <unordered_map>
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/service/service.h"
 
@@ -32,6 +33,8 @@ private:
 
     std::shared_ptr<ServiceManager> service_manager;
     Kernel::SharedPtr<Kernel::Semaphore> notification_semaphore;
+    std::unordered_map<std::string, Kernel::SharedPtr<Kernel::Event>>
+        get_service_handle_delayed_map;
 };
 
 } // namespace SM