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59 lines
1.6 KiB
59 lines
1.6 KiB
/* |
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** Copyright 2007, The Android Open Source Project |
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** |
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** Licensed under the Apache License, Version 2.0 (the "License"); |
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** you may not use this file except in compliance with the License. |
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** You may obtain a copy of the License at |
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** |
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** http://www.apache.org/licenses/LICENSE-2.0 |
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** |
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** Unless required by applicable law or agreed to in writing, software |
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** distributed under the License is distributed on an "AS IS" BASIS, |
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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** See the License for the specific language governing permissions and |
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** limitations under the License. |
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*/ |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include <cutils/iosched_policy.h> |
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#if defined(__ANDROID__) |
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#define IOPRIO_WHO_PROCESS (1) |
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#define IOPRIO_CLASS_SHIFT (13) |
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#include <sys/syscall.h> |
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#define __android_unused |
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#else |
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#define __android_unused __attribute__((__unused__)) |
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#endif |
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int android_set_ioprio(int pid __android_unused, IoSchedClass clazz __android_unused, int ioprio __android_unused) { |
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#if defined(__ANDROID__) |
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if (syscall(SYS_ioprio_set, IOPRIO_WHO_PROCESS, pid, ioprio | (clazz << IOPRIO_CLASS_SHIFT))) { |
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return -1; |
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} |
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#endif |
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return 0; |
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} |
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int android_get_ioprio(int pid __android_unused, IoSchedClass *clazz, int *ioprio) { |
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#if defined(__ANDROID__) |
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int rc; |
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if ((rc = syscall(SYS_ioprio_get, IOPRIO_WHO_PROCESS, pid)) < 0) { |
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return -1; |
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} |
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*clazz = (rc >> IOPRIO_CLASS_SHIFT); |
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*ioprio = (rc & 0xff); |
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#else |
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*clazz = IoSchedClass_NONE; |
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*ioprio = 0; |
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#endif |
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return 0; |
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}
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