1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
// Copyright 2015 The Bazel Authors. All rights reserved.
//
// 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.
#include <stdio.h>
#include <windows.h>
#include <string>
#include "src/main/cpp/util/errors.h"
#include "src/main/cpp/util/logging.h"
#include "src/main/cpp/util/path_platform.h"
#include "src/main/cpp/util/strings.h"
#include "third_party/ijar/mapped_file.h"
#define MAX_ERROR 2048
namespace devtools_ijar {
using std::string;
using std::wstring;
static char errmsg[MAX_ERROR] = "";
struct MappedInputFileImpl {
HANDLE file_;
HANDLE mapping_;
MappedInputFileImpl(HANDLE file, HANDLE mapping) {
file_ = file;
mapping_ = mapping;
}
};
MappedInputFile::MappedInputFile(const char* name) {
impl_ = NULL;
opened_ = false;
errmsg_ = errmsg;
wstring wname;
string error;
if (!blaze_util::AsAbsoluteWindowsPath(name, &wname, &error)) {
BAZEL_DIE(255) << "MappedInputFile(" << name
<< "): AsAbsoluteWindowsPath failed: " << error;
}
HANDLE file = CreateFileW(wname.c_str(), GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, 0, NULL);
if (file == INVALID_HANDLE_VALUE) {
string errormsg = blaze_util::GetLastErrorString();
BAZEL_DIE(255) << "MappedInputFile(" << name << "): CreateFileW("
<< blaze_util::WstringToString(wname)
<< ") failed: " << errormsg;
}
LARGE_INTEGER size;
if (!GetFileSizeEx(file, &size)) {
string errormsg = blaze_util::GetLastErrorString();
BAZEL_DIE(255) << "MappedInputFile(" << name
<< "): GetFileSizeEx failed: " << errormsg;
}
HANDLE mapping = CreateFileMapping(file, NULL, PAGE_READONLY,
size.HighPart, size.LowPart, NULL);
if (mapping == NULL || mapping == INVALID_HANDLE_VALUE) {
string errormsg = blaze_util::GetLastErrorString();
BAZEL_DIE(255) << "MappedInputFile(" << name
<< "): CreateFileMapping failed: " << errormsg;
}
void *view = MapViewOfFileEx(mapping, FILE_MAP_READ, 0, 0, 0, NULL);
if (view == NULL) {
string errormsg = blaze_util::GetLastErrorString();
BAZEL_DIE(255) << "MappedInputFile(" << name
<< "): MapViewOfFileEx failed: " << errormsg;
}
impl_ = new MappedInputFileImpl(file, mapping);
length_ = size.QuadPart;
buffer_ = reinterpret_cast<u1*>(view);
opened_ = true;
}
MappedInputFile::~MappedInputFile() {
delete impl_;
}
void MappedInputFile::Discard(size_t bytes) {
// This is not supported on Windows for now. I'm not sure if we can unmap
// parts of an existing view and that this is necessary for Windows at all.
// At any rate, this only matters for >2GB (or maybe >4GB?) input files.
}
int MappedInputFile::Close() {
if (!UnmapViewOfFile(buffer_)) {
string errormsg = blaze_util::GetLastErrorString();
BAZEL_DIE(255) << "MappedInputFile::Close: UnmapViewOfFile failed: "
<< errormsg;
}
if (!CloseHandle(impl_->mapping_)) {
string errormsg = blaze_util::GetLastErrorString();
BAZEL_DIE(255) << "MappedInputFile::Close: CloseHandle for mapping failed: "
<< errormsg;
}
if (!CloseHandle(impl_->file_)) {
string errormsg = blaze_util::GetLastErrorString();
BAZEL_DIE(255) << "MappedInputFile::Close: CloseHandle for file failed: "
<< errormsg;
}
return 0;
}
struct MappedOutputFileImpl {
HANDLE file_;
HANDLE mapping_;
MappedOutputFileImpl(HANDLE file, HANDLE mapping) {
file_ = file;
mapping_ = mapping;
}
};
MappedOutputFile::MappedOutputFile(const char* name, size_t estimated_size) {
impl_ = NULL;
opened_ = false;
errmsg_ = errmsg;
wstring wname;
string error;
if (!blaze_util::AsAbsoluteWindowsPath(name, &wname, &error)) {
BAZEL_DIE(255) << "MappedOutputFile(" << name
<< "): AsAbsoluteWindowsPath failed: " << error;
}
HANDLE file = CreateFileW(wname.c_str(), GENERIC_READ | GENERIC_WRITE, 0,
NULL, CREATE_ALWAYS, 0, NULL);
if (file == INVALID_HANDLE_VALUE) {
string errormsg = blaze_util::GetLastErrorString();
BAZEL_DIE(255) << "MappedOutputFile(" << name << "): CreateFileW("
<< blaze_util::WstringToString(wname)
<< ") failed: " << errormsg;
}
HANDLE mapping = CreateFileMapping(file, NULL, PAGE_READWRITE,
estimated_size >> 32, estimated_size & 0xffffffffUL, NULL);
if (mapping == NULL || mapping == INVALID_HANDLE_VALUE) {
BAZEL_DIE(255) << "MappedOutputFile(" << name
<< "): CreateFileMapping failed";
}
void *view = MapViewOfFileEx(mapping, FILE_MAP_ALL_ACCESS, 0, 0, 0, NULL);
if (view == NULL) {
string errormsg = blaze_util::GetLastErrorString();
BAZEL_DIE(255) << "MappedOutputFile(" << name
<< "): MapViewOfFileEx failed: " << errormsg;
CloseHandle(mapping);
CloseHandle(file);
return;
}
impl_ = new MappedOutputFileImpl(file, mapping);
buffer_ = reinterpret_cast<u1*>(view);
opened_ = true;
}
MappedOutputFile::~MappedOutputFile() {
delete impl_;
}
int MappedOutputFile::Close(size_t size) {
if (!UnmapViewOfFile(buffer_)) {
BAZEL_DIE(255) << "MappedOutputFile::Close: UnmapViewOfFile failed: "
<< blaze_util::GetLastErrorString();
}
if (!CloseHandle(impl_->mapping_)) {
BAZEL_DIE(255)
<< "MappedOutputFile::Close: CloseHandle for mapping failed: "
<< blaze_util::GetLastErrorString();
}
if (!SetFilePointer(impl_->file_, size, NULL, FILE_BEGIN)) {
BAZEL_DIE(255) << "MappedOutputFile::Close: SetFilePointer failed: "
<< blaze_util::GetLastErrorString();
}
if (!SetEndOfFile(impl_->file_)) {
BAZEL_DIE(255) << "MappedOutputFile::Close: SetEndOfFile failed: "
<< blaze_util::GetLastErrorString();
}
if (!CloseHandle(impl_->file_)) {
BAZEL_DIE(255) << "MappedOutputFile::Close: CloseHandle for file failed: "
<< blaze_util::GetLastErrorString();
}
return 0;
}
} // namespace devtools_ijar
|
