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VwCacheReader.cpp
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1 /*
2  * Copyright (c) 2009 Yahoo! Inc. All rights reserved. The copyrights
3  * embodied in the content of this file are licensed under the BSD
4  * (revised) open source license.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * Written (W) 2011 Shashwat Lal Das
12  * Adaptation of Vowpal Wabbit v5.1.
13  * Copyright (C) 2011 Berlin Institute of Technology and Max-Planck-Society.
14  */
15 
17 #include <fcntl.h>
18 #ifdef _WIN32
19 #include <io.h>
20 #endif
21 
22 using namespace shogun;
23 
25  : CSGObject()
26 {
27  fd = -1;
28  env = NULL;
29 }
30 
32  : CSGObject()
33 {
34  fd = open(fname, O_RDONLY);
35 
36  if (fd < 0)
37  SG_SERROR("Error opening the file %s for reading from cache!\n")
38 
39  env = env_to_use;
40  SG_REF(env);
41 }
42 
44  : CSGObject()
45 {
46  fd = f;
47  env = env_to_use;
48  SG_REF(env);
49 }
50 
52 {
53  // Does not attempt to close file as it could have been passed
54  // from oustide
55  if (env)
56  SG_UNREF(env);
57 }
58 
59 void CVwCacheReader::set_file(int32_t f)
60 {
61  fd = f;
62 }
63 
65 {
66  env = env_to_use;
67  SG_REF(env);
68 }
69 
71 {
72  SG_REF(env);
73  return env;
74 }
Class CVwEnvironment is the environment used by VW.
Definition: VwEnvironment.h:41
virtual CVwEnvironment * get_env()
#define SG_REF(x)
Definition: SGObject.h:52
CVwEnvironment * env
Environment.
Class SGObject is the base class of all shogun objects.
Definition: SGObject.h:125
virtual void set_env(CVwEnvironment *env_to_use)
virtual void set_file(int32_t f)
#define SG_UNREF(x)
Definition: SGObject.h:53
all of classes and functions are contained in the shogun namespace
Definition: class_list.h:18
#define SG_SERROR(...)
Definition: SGIO.h:178
int32_t fd
File descriptor.

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