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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 part of core; | |
| 6 | |
| 7 class _MojoSharedBufferNatives { | |
| 8 static List Create(int num_bytes, int flags) | |
| 9 native "MojoSharedBuffer_Create"; | |
| 10 | |
| 11 static List Duplicate(int buffer_handle, int flags) | |
| 12 native "MojoSharedBuffer_Duplicate"; | |
| 13 | |
| 14 static List Map(int buffer_handle, int offset, int num_bytes, int flags) | |
| 15 native "MojoSharedBuffer_Map"; | |
| 16 | |
| 17 static int Unmap(ByteData buffer) | |
| 18 native "MojoSharedBuffer_Unmap"; | |
| 19 } | |
| 20 | |
| 21 | |
| 22 class MojoSharedBuffer { | |
| 23 static const int CREATE_FLAG_NONE = 0; | |
| 24 static const int DUPLICATE_FLAG_NONE = 0; | |
| 25 static const int MAP_FLAG_NONE = 0; | |
| 26 | |
| 27 RawMojoHandle handle; | |
| 28 MojoResult status; | |
| 29 ByteData mapping; | |
| 30 | |
| 31 MojoSharedBuffer._() { | |
| 32 handle = null; | |
| 33 status = MojoResult.OK; | |
| 34 mapping = null; | |
| 35 } | |
| 36 | |
| 37 factory MojoSharedBuffer(int num_bytes, [int flags = 0]) { | |
| 38 List result = _MojoSharedBufferNatives.Create(num_bytes, flags); | |
| 39 if (result == null) { | |
| 40 return null; | |
| 41 } | |
| 42 assert((result is List) && (result.length == 2)); | |
| 43 var r = new MojoResult(result[0]); | |
| 44 if (!r.isOk) { | |
| 45 return null; | |
| 46 } | |
| 47 | |
| 48 MojoSharedBuffer buf = new MojoSharedBuffer._(); | |
| 49 buf.status = r; | |
| 50 buf.handle = new RawMojoHandle(result[1]); | |
| 51 buf.mapping = null; | |
| 52 return buf; | |
| 53 } | |
| 54 | |
| 55 factory MojoSharedBuffer.duplicate(MojoSharedBuffer msb, [int flags = 0]) { | |
| 56 List result = _MojoSharedBufferNatives.Duplicate(msb.handle.h, flags); | |
| 57 if (result == null) { | |
| 58 return null; | |
| 59 } | |
| 60 assert((result is List) && (result.length == 2)); | |
| 61 var r = new MojoResult(result[0]); | |
| 62 if(!r.isOk) { | |
| 63 return null; | |
| 64 } | |
| 65 | |
| 66 MojoSharedBuffer dupe = new MojoSharedBuffer._(); | |
| 67 dupe.status = r; | |
| 68 dupe.handle = new RawMojoHandle(result[1]); | |
| 69 dupe.mapping = msb.mapping; | |
| 70 return dupe; | |
| 71 } | |
| 72 | |
| 73 MojoResult close() { | |
| 74 if (handle == null) { | |
| 75 status = MojoResult.INVALID_ARGUMENT; | |
| 76 return status; | |
| 77 } | |
| 78 MojoResult r = handle.close(); | |
| 79 status = r; | |
| 80 mapping = null; | |
| 81 return status; | |
| 82 } | |
| 83 | |
| 84 MojoResult map(int offset, int num_bytes, [int flags = 0]) { | |
| 85 if (handle == null) { | |
| 86 status = MojoResult.INVALID_ARGUMENT; | |
| 87 return status; | |
| 88 } | |
| 89 List result = _MojoSharedBufferNatives.Map( | |
| 90 handle.h, offset, num_bytes, flags); | |
| 91 if (result == null) { | |
| 92 status = MojoResult.INVALID_ARGUMENT; | |
| 93 return status; | |
| 94 } | |
| 95 assert((result is List) && (result.length == 2)); | |
| 96 status = new MojoResult(result[0]); | |
| 97 mapping = result[1]; | |
| 98 return status; | |
| 99 } | |
| 100 | |
| 101 MojoResult unmap() { | |
| 102 int r = _MojoSharedBufferNatives.Unmap(mapping); | |
| 103 status = new MojoResult(r); | |
| 104 mapping = null; | |
| 105 return status; | |
| 106 } | |
| 107 } | |
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Chromium Code Reviews
Issue 728043002:
Revert of Update mojo sdk to rev afb4440fd5a10cba980878c326180b7ad7960480 (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master