Milestone 5: deliver embedded RDP sessions and lifecycle hardening

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

@@ -0,0 +1,145 @@
+/**
+ * WinPR: Windows Portable Runtime
+ * Thread Pool API (Clean-up Group)
+ *
+ * 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/winpr.h>
+#include <winpr/crt.h>
+#include <winpr/pool.h>
+#include <winpr/library.h>
+
+#include "pool.h"
+
+#ifdef WINPR_THREAD_POOL
+
+#ifdef _WIN32
+static INIT_ONCE init_once_module = INIT_ONCE_STATIC_INIT;
+static PTP_CLEANUP_GROUP(WINAPI* pCreateThreadpoolCleanupGroup)();
+static VOID(WINAPI* pCloseThreadpoolCleanupGroupMembers)(PTP_CLEANUP_GROUP ptpcg,
+                                                         BOOL fCancelPendingCallbacks,
+                                                         PVOID pvCleanupContext);
+static VOID(WINAPI* pCloseThreadpoolCleanupGroup)(PTP_CLEANUP_GROUP ptpcg);
+
+static BOOL CALLBACK init_module(PINIT_ONCE once, PVOID param, PVOID* context)
+{
+	HMODULE kernel32 = LoadLibraryA("kernel32.dll");
+
+	if (kernel32)
+	{
+		pCreateThreadpoolCleanupGroup =
+		    GetProcAddressAs(kernel32, "CreateThreadpoolCleanupGroup", void*);
+		pCloseThreadpoolCleanupGroupMembers =
+		    GetProcAddressAs(kernel32, "CloseThreadpoolCleanupGroupMembers", void*);
+		pCloseThreadpoolCleanupGroup =
+		    GetProcAddressAs(kernel32, "CloseThreadpoolCleanupGroup", void*);
+	}
+
+	return TRUE;
+}
+#endif
+
+PTP_CLEANUP_GROUP winpr_CreateThreadpoolCleanupGroup(void)
+{
+	PTP_CLEANUP_GROUP cleanupGroup = nullptr;
+#ifdef _WIN32
+	if (!InitOnceExecuteOnce(&init_once_module, init_module, nullptr, nullptr))
+		return nullptr;
+
+	if (pCreateThreadpoolCleanupGroup)
+		return pCreateThreadpoolCleanupGroup();
+
+	return cleanupGroup;
+#else
+	cleanupGroup = (PTP_CLEANUP_GROUP)calloc(1, sizeof(TP_CLEANUP_GROUP));
+
+	if (!cleanupGroup)
+		return nullptr;
+
+	cleanupGroup->groups = ArrayList_New(FALSE);
+
+	if (!cleanupGroup->groups)
+	{
+		free(cleanupGroup);
+		return nullptr;
+	}
+
+	return cleanupGroup;
+#endif
+}
+
+VOID winpr_SetThreadpoolCallbackCleanupGroup(PTP_CALLBACK_ENVIRON pcbe, PTP_CLEANUP_GROUP ptpcg,
+                                             PTP_CLEANUP_GROUP_CANCEL_CALLBACK pfng)
+{
+	pcbe->CleanupGroup = ptpcg;
+	pcbe->CleanupGroupCancelCallback = pfng;
+#ifndef _WIN32
+	pcbe->CleanupGroup->env = pcbe;
+#endif
+}
+
+VOID winpr_CloseThreadpoolCleanupGroupMembers(WINPR_ATTR_UNUSED PTP_CLEANUP_GROUP ptpcg,
+                                              WINPR_ATTR_UNUSED BOOL fCancelPendingCallbacks,
+                                              WINPR_ATTR_UNUSED PVOID pvCleanupContext)
+{
+#ifdef _WIN32
+	if (!InitOnceExecuteOnce(&init_once_module, init_module, nullptr, nullptr))
+		return;
+
+	if (pCloseThreadpoolCleanupGroupMembers)
+	{
+		pCloseThreadpoolCleanupGroupMembers(ptpcg, fCancelPendingCallbacks, pvCleanupContext);
+		return;
+	}
+
+#else
+
+	while (ArrayList_Count(ptpcg->groups) > 0)
+	{
+		PTP_WORK work = ArrayList_GetItem(ptpcg->groups, 0);
+		winpr_CloseThreadpoolWork(work);
+	}
+
+#endif
+}
+
+VOID winpr_CloseThreadpoolCleanupGroup(PTP_CLEANUP_GROUP ptpcg)
+{
+#ifdef _WIN32
+	if (!InitOnceExecuteOnce(&init_once_module, init_module, nullptr, nullptr))
+		return;
+
+	if (pCloseThreadpoolCleanupGroup)
+	{
+		pCloseThreadpoolCleanupGroup(ptpcg);
+		return;
+	}
+
+#else
+
+	if (ptpcg && ptpcg->groups)
+		ArrayList_Free(ptpcg->groups);
+
+	if (ptpcg && ptpcg->env)
+		ptpcg->env->CleanupGroup = nullptr;
+
+	free(ptpcg);
+#endif
+}
+
+#endif /* WINPR_THREAD_POOL defined */