| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| struct Thread; |
| |
| /* |
| * Raises the scheduling priority of the current thread. Returns the |
| * original priority if successful, or INT_MAX on failure. |
| * Use os_lowerThreadPriority to undo. |
| * |
| * TODO: does the GC really need this? |
| */ |
| int os_raiseThreadPriority(); |
| |
| /* |
| * Sets the current thread scheduling priority. Used to undo the effects |
| * of an earlier call to os_raiseThreadPriority. |
| * |
| * TODO: does the GC really need this? |
| */ |
| void os_lowerThreadPriority(int oldThreadPriority); |
| |
| /* |
| * Changes the priority of a system thread to match that of the Thread object. |
| * |
| * We map a priority value from 1-10 to Linux "nice" values, where lower |
| * numbers indicate higher priority. |
| */ |
| void os_changeThreadPriority(Thread* thread, int newPriority); |
| |
| /* |
| * Returns the thread priority for the current thread by querying the system. |
| * This is useful when attaching a thread through JNI. |
| * |
| * Returns a value from 1 to 10 (compatible with java.lang.Thread values). |
| */ |
| int os_getThreadPriorityFromSystem(); |