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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 package impl | |
| 6 | |
| 7 //#include "mojo/public/platform/native/system_thunks.h" | |
| 8 //#include "mojo/public/c/system/main.h" | |
| 9 import "C" | |
| 10 import "unsafe" | |
| 11 | |
| 12 var core *CoreImpl | |
| 13 | |
| 14 func init() { | |
| 15 core = &CoreImpl{} | |
| 16 } | |
| 17 | |
| 18 // CoreImpl is an implementation of the Mojo system APIs. | |
| 19 type CoreImpl struct { | |
| 20 } | |
| 21 | |
| 22 func GetCore() *CoreImpl { | |
| 23 return core | |
| 24 } | |
| 25 | |
| 26 func (c *CoreImpl) GetTimeTicksNow() MojoTimeTicks { | |
| 27 return (MojoTimeTicks)(C.MojoGetTimeTicksNow()) | |
| 28 } | |
| 29 | |
| 30 func (c *CoreImpl) Close(handle MojoHandle) MojoResult { | |
| 31 return (MojoResult)(C.MojoClose(handle.cType())) | |
| 32 } | |
| 33 | |
| 34 func (c *CoreImpl) Wait(handle MojoHandle, signal MojoHandleSignals, deadline Mo
joDeadline) (MojoResult, *MojoHandleSignalsState) { | |
| 35 var signal_states C.struct_MojoHandleSignalsState | |
| 36 result := C.MojoNewWait(handle.cType(), signal.cType(), deadline.cType()
, &signal_states) | |
| 37 return MojoResult(result), &MojoHandleSignalsState{MojoHandleSignals(sig
nal_states.satisfied_signals), MojoHandleSignals(signal_states.satisfiable_signa
ls)} | |
| 38 } | |
| 39 | |
| 40 func (c *CoreImpl) WaitMany(handles []MojoHandle, signals []MojoHandleSignals, d
eadline MojoDeadline) (result MojoResult, index *uint32, state []MojoHandleSigna
lsState) { | |
| 41 // Set "-1" using the instructions from http://blog.golang.org/constants | |
| 42 cindex := ^C.uint32_t(0) | |
| 43 cstate := make([]C.struct_MojoHandleSignalsState, len(handles)) | |
| 44 | |
| 45 result = (MojoResult)(C.MojoNewWaitMany(cArrayMojoHandle(handles), cArra
yMojoHandleSignals(signals), (C.uint32_t)(len(handles)), deadline.cType(), &cind
ex, &cstate[0])) | |
| 46 | |
| 47 if uint32(cindex) < uint32(len(handles)) { | |
| 48 temp := uint32(cindex) | |
| 49 index = &temp | |
| 50 } | |
| 51 | |
| 52 if result != MOJO_RESULT_INVALID_ARGUMENT && result != MOJO_RESULT_RESOU
RCE_EXHAUSTED { | |
| 53 state = make([]MojoHandleSignalsState, len(cstate)) | |
| 54 for i, value := range cstate { | |
| 55 state[i] = NewMojoHandleSignalsState(value) | |
| 56 } | |
| 57 } | |
| 58 | |
| 59 return | |
| 60 } | |
| 61 | |
| 62 func (c *CoreImpl) CreateMessagePipe(opts *MessagePipeOptions) (MojoResult, Mojo
Handle, MojoHandle) { | |
| 63 var handle0, handle1 C.MojoHandle | |
| 64 result := C.MojoCreateMessagePipe(opts.cType(), &handle0, &handle1) | |
| 65 return (MojoResult)(result), (MojoHandle)(handle0), (MojoHandle)(handle1
) | |
| 66 } | |
| 67 | |
| 68 func (c *CoreImpl) WriteMessage(handle MojoHandle, msg []byte, attached []MojoHa
ndle, flags MojoWriteMessageFlags) MojoResult { | |
| 69 return (MojoResult)(C.MojoWriteMessage(handle.cType(), cArrayBytes(msg),
(C.uint32_t)(len(msg)), cArrayMojoHandle(attached), (C.uint32_t)(len(attached))
, flags.cType())) | |
| 70 } | |
| 71 | |
| 72 func (c *CoreImpl) ReadMessage(handle MojoHandle, flags MojoReadMessageFlags) (M
ojoResult, []byte, []MojoHandle, uint32, uint32) { | |
| 73 var num_bytes, num_handles C.uint32_t | |
| 74 if result := C.MojoReadMessage(handle.cType(), nil, &num_bytes, nil, &nu
m_handles, flags.cType()); result != C.MOJO_RESULT_RESOURCE_EXHAUSTED { | |
| 75 return (MojoResult)(result), nil, nil, 0, 0 | |
| 76 } | |
| 77 msg := make([]byte, (uint32)(num_bytes)) | |
| 78 attached := make([]MojoHandle, (uint32)(num_handles)) | |
| 79 result := C.MojoReadMessage(handle.cType(), cArrayBytes(msg), &num_bytes
, cArrayMojoHandle(attached), &num_handles, (C.MojoReadMessageFlags)(flags)) | |
| 80 return (MojoResult)(result), msg, attached, (uint32)(num_bytes), (uint32
)(num_handles) | |
| 81 } | |
| 82 | |
| 83 func (c *CoreImpl) CreateDataPipe(opts *DataPipeOptions) (MojoResult, MojoHandle
, MojoHandle) { | |
| 84 var producer, consumer C.MojoHandle | |
| 85 result := C.MojoCreateDataPipe(opts.cType(), &producer, &consumer) | |
| 86 return (MojoResult)(result), (MojoHandle)(producer), (MojoHandle)(consum
er) | |
| 87 } | |
| 88 | |
| 89 func (c *CoreImpl) WriteData(producer MojoHandle, data []byte, flags MojoWriteDa
taFlags) (MojoResult, uint32) { | |
| 90 num_bytes := (C.uint32_t)(len(data)) | |
| 91 result := C.MojoWriteData(producer.cType(), cArrayBytes(data), &num_byte
s, flags.cType()) | |
| 92 return (MojoResult)(result), (uint32)(num_bytes) | |
| 93 } | |
| 94 | |
| 95 func (c *CoreImpl) ReadData(consumer MojoHandle, flags MojoReadDataFlags) (MojoR
esult, []byte) { | |
| 96 var num_bytes C.uint32_t | |
| 97 var result C.MojoResult | |
| 98 if result = C.MojoReadData(consumer.cType(), nil, &num_bytes, C.MOJO_REA
D_DATA_FLAG_QUERY); result != C.MOJO_RESULT_OK { | |
| 99 return (MojoResult)(result), nil | |
| 100 } | |
| 101 data := make([]byte, (uint32)(num_bytes)) | |
| 102 result = C.MojoReadData(consumer.cType(), cArrayBytes(data), &num_bytes,
flags.cType()) | |
| 103 return (MojoResult)(result), data | |
| 104 } | |
| 105 | |
| 106 func (c *CoreImpl) CreateSharedBuffer(opts *SharedBufferOptions, numBytes uint64
) (MojoResult, MojoHandle) { | |
| 107 var handle C.MojoHandle | |
| 108 result := C.MojoCreateSharedBuffer(opts.cType(), (C.uint64_t)(numBytes),
&handle) | |
| 109 return (MojoResult)(result), (MojoHandle)(handle) | |
| 110 } | |
| 111 | |
| 112 func (c *CoreImpl) DuplicateBufferHandle(handle MojoHandle, opts *DuplicateBuffe
rHandleOptions) (MojoResult, MojoHandle) { | |
| 113 var duplicate C.MojoHandle | |
| 114 result := C.MojoDuplicateBufferHandle(handle.cType(), opts.cType(), &dup
licate) | |
| 115 return (MojoResult)(result), (MojoHandle)(duplicate) | |
| 116 } | |
| 117 | |
| 118 func (c *CoreImpl) MapBuffer(handle MojoHandle, offset uint64, numBytes uint64,
flags MojoMapBufferFlags) (MojoResult, unsafe.Pointer) { | |
| 119 var bufPtr unsafe.Pointer | |
| 120 result := C.MojoMapBuffer(handle.cType(), (C.uint64_t)(offset), (C.uint6
4_t)(numBytes), &bufPtr, flags.cType()) | |
| 121 if result != C.MOJO_RESULT_OK { | |
| 122 return (MojoResult)(result), nil | |
| 123 } | |
| 124 return MOJO_RESULT_OK, bufPtr | |
| 125 } | |
| 126 | |
| 127 func (c *CoreImpl) UnmapBuffer(buffer unsafe.Pointer) MojoResult { | |
| 128 return (MojoResult)(C.MojoUnmapBuffer(buffer)) | |
| 129 } | |
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