cbb288bfe8
Rewrote SurfaceFlinger's buffer management from the ground-up. The design now support an arbitrary number of buffers per surface, however the current implementation is limited to four. Currently only 2 buffers are used in practice. The main new feature is to be able to dequeue all buffers at once (very important when there are only two). A client can dequeue all buffers until there are none available, it can lock all buffers except the last one that is used for composition. The client will block then, until a new buffer is enqueued. The current implementation requires that buffers are locked in the same order they are dequeued and enqueued in the same order they are locked. Only one buffer can be locked at a time. eg. Allowed sequence: DQ, DQ, LOCK, Q, LOCK, Q eg. Forbidden sequence: DQ, DQ, LOCK, LOCK, Q, Q
88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
/*
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* Copyright (C) 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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#ifndef ANDROID_ERRORS_H
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#define ANDROID_ERRORS_H
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#include <sys/types.h>
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#include <errno.h>
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namespace android {
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// use this type to return error codes
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#ifdef HAVE_MS_C_RUNTIME
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typedef int status_t;
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#else
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typedef int32_t status_t;
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#endif
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/* the MS C runtime lacks a few error codes */
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/*
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* Error codes.
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* All error codes are negative values.
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*/
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// Win32 #defines NO_ERROR as well. It has the same value, so there's no
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// real conflict, though it's a bit awkward.
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#ifdef _WIN32
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# undef NO_ERROR
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#endif
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enum {
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OK = 0, // Everything's swell.
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NO_ERROR = 0, // No errors.
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UNKNOWN_ERROR = 0x80000000,
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NO_MEMORY = -ENOMEM,
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INVALID_OPERATION = -ENOSYS,
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BAD_VALUE = -EINVAL,
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BAD_TYPE = 0x80000001,
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NAME_NOT_FOUND = -ENOENT,
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PERMISSION_DENIED = -EPERM,
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NO_INIT = -ENODEV,
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ALREADY_EXISTS = -EEXIST,
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DEAD_OBJECT = -EPIPE,
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FAILED_TRANSACTION = 0x80000002,
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JPARKS_BROKE_IT = -EPIPE,
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#if !defined(HAVE_MS_C_RUNTIME)
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BAD_INDEX = -EOVERFLOW,
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NOT_ENOUGH_DATA = -ENODATA,
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WOULD_BLOCK = -EWOULDBLOCK,
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TIMED_OUT = -ETIMEDOUT,
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UNKNOWN_TRANSACTION = -EBADMSG,
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#else
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BAD_INDEX = -E2BIG,
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NOT_ENOUGH_DATA = 0x80000003,
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WOULD_BLOCK = 0x80000004,
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TIMED_OUT = 0x80000005,
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UNKNOWN_TRANSACTION = 0x80000006,
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#endif
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};
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// Restore define; enumeration is in "android" namespace, so the value defined
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// there won't work for Win32 code in a different namespace.
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#ifdef _WIN32
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# define NO_ERROR 0L
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#endif
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}; // namespace android
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// ---------------------------------------------------------------------------
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#endif // ANDROID_ERRORS_H
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