Milestone 5: deliver embedded RDP sessions and lifecycle hardening

third_party/FreeRDP/winpr/libwinpr/pool/callback.c

@@ -0,0 +1,57 @@
+/**
+ * WinPR: Windows Portable Runtime
+ * Thread Pool API (Callback)
+ *
+ * Copyright 2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <winpr/config.h>
+
+#include <winpr/crt.h>
+#include <winpr/pool.h>
+#include <winpr/wlog.h>
+#include <winpr/library.h>
+
+#ifdef WINPR_THREAD_POOL
+
+#ifdef _WIN32
+typedef BOOL(WINAPI* pCallbackMayRunLong_t)(PTP_CALLBACK_INSTANCE pci);
+static INIT_ONCE init_once_module = INIT_ONCE_STATIC_INIT;
+static pCallbackMayRunLong_t pCallbackMayRunLong = nullptr;
+
+static BOOL CALLBACK init_module(PINIT_ONCE once, PVOID param, PVOID* context)
+{
+	HMODULE kernel32 = LoadLibraryA("kernel32.dll");
+	if (kernel32)
+		pCallbackMayRunLong =
+		    GetProcAddressAs(kernel32, "CallbackMayRunLong", pCallbackMayRunLong_t);
+	return TRUE;
+}
+#endif
+
+BOOL winpr_CallbackMayRunLong(WINPR_ATTR_UNUSED PTP_CALLBACK_INSTANCE pci)
+{
+#ifdef _WIN32
+	if (!InitOnceExecuteOnce(&init_once_module, init_module, nullptr, nullptr))
+		return FALSE;
+	if (pCallbackMayRunLong)
+		return pCallbackMayRunLong(pci);
+#endif
+	WLog_ERR("TODO", "TODO: implement");
+	/* No default implementation */
+	return FALSE;
+}
+
+#endif /* WINPR_THREAD_POOL defined */