1 /*
2  Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
3 
4  This program is free software; you can redistribute it and/or modify
5  it under the terms of the GNU General Public License, version 2.0,
6  as published by the Free Software Foundation.
7 
8  This program is also distributed with certain software (including
9  but not limited to OpenSSL) that is licensed under separate terms,
10  as designated in a particular file or component or in included license
11  documentation.  The authors of MySQL hereby grant you an additional
12  permission to link the program and your derivative works with the
13  separately licensed software that they have included with MySQL.
14 
15  This program is distributed in the hope that it will be useful,
16  but WITHOUT ANY WARRANTY; without even the implied warranty of
17  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  GNU General Public License, version 2.0, for more details.
19 
20  You should have received a copy of the GNU General Public License
21  along with this program; if not, write to the Free Software
22  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
23 */
24 /*
25  * helpers.hpp
26  */
27 
28 #ifndef helpers_hpp
29 #define helpers_hpp
30 
31 //#include <cstdio>
32 #include <cstdlib>
33 #include <iostream>
34 #include <cstring>
35 
36 //using namespace std;
37 using std::cout;
38 using std::endl;
39 using std::flush;
40 
41 /************************************************************
42  * Helper Macros & Functions
43  ************************************************************/
44 
45 // JNI crashes with gcc & operator<<(ostream &, long/int)
46 // so, we use C99's __func__ and also convert to string using sprintf()
47 #define ABORT_ERROR(message)                                            \
48     do {                                                                \
49         char l[1024];                                                   \
50         sprintf(l, "%d", __LINE__);                                     \
51         cout << "!!! error, file: " << (__FILE__)                       \
52              << ", function: " << (__func__)                            \
53              << ", line: " << l                                         \
54              << ", msg: " << message << "." << endl;                    \
55         exit(-1);                                                       \
56     } while (0)
57 
58 // an output stream for debug messages
59 #if DEBUG
60 #define CDBG if (0); else cout
61 #else
62 #define CDBG if (1); else cout
63 #endif
64 
65 // some macros for tracing
66 #define ENTER(name)                             \
67     CDBG << "--> " << name << endl;
68 
69 #define LEAVE(name)                             \
70     CDBG << "<-- " << name << endl;
71 
72 #define TRACE(name)                             \
73     Tracer _tracer_(name);
74 
75 // use as:
76 // myfunction() {
77 //   TRACE("myfunction()");
78 //   ...
79 // }
80 class Tracer
81 {
82     const char* const name;
83 public:
Tracer(const char * name)84     Tracer(const char* name) : name(name) {
85         ENTER(name);
86     }
87 
~Tracer()88     ~Tracer() {
89         LEAVE(name);
90     }
91 };
92 
93 #endif // helpers_hpp
94