Should have been part of r39453. The libroot implementation of

get_extended_team_info().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39454 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/libroot/os/extended_system_info.cpp

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2010, Ingo Weinhold, ingo_weinhold@gmx.de.
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include <extended_system_info.h>
+#include <extended_system_info_defs.h>
+
+#include <syscalls.h>
+#include <AutoDeleter.h>
+
+#include <util/KMessage.h>
+
+
+namespace BPrivate {
+
+
+status_t
+get_extended_team_info(team_id teamID, uint32 flags, KMessage& info)
+{
+	// initial buffer size
+	size_t bufferSize = 4096;
+		// TODO: Pick it depending on the set flags.
+
+	while (true) {
+		// allocate the buffer
+		void* buffer = malloc(bufferSize);
+		if (buffer == NULL)
+			return B_NO_MEMORY;
+		MemoryDeleter bufferDeleter(buffer);
+
+		// get the info
+		size_t sizeNeeded;
+		status_t error = _kern_get_extended_team_info(teamID, flags, buffer,
+			bufferSize, &sizeNeeded);
+		if (error == B_OK) {
+			return info.SetTo((const void*)buffer, sizeNeeded,
+				KMessage::KMESSAGE_CLONE_BUFFER);
+				// TODO: Just transfer our buffer, if it isn't much larger.
+		}
+
+		if (error != B_BUFFER_OVERFLOW)
+			return error;
+
+		// The buffer was too small. Try again with a larger one.
+		bufferSize = (sizeNeeded + 1023) / 1024 * 1024;
+	}
+}
+
+
+}	// namespace BPrivate