globalDefinitions_visCPP.hpp revision 5776:de6a9e811145 
1/*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#ifndef SHARE_VM_UTILITIES_GLOBALDEFINITIONS_VISCPP_HPP
26#define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_VISCPP_HPP
27
28#include "prims/jni.h"
29
30// This file holds compiler-dependent includes,
31// globally used constants & types, class (forward)
32// declarations and a few frequently used utility functions.
33
34# include <ctype.h>
35# include <string.h>
36# include <stdarg.h>
37# include <stdlib.h>
38# include <stddef.h>// for offsetof
39# include <io.h>    // for stream.cpp
40# include <float.h> // for _isnan
41# include <stdio.h> // for va_list
42# include <time.h>
43# include <fcntl.h>
44# include <limits.h>
45// Need this on windows to get the math constants (e.g., M_PI).
46#define _USE_MATH_DEFINES
47# include <math.h>
48
49// 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures
50// When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in
51// system header files.  On 32-bit architectures, there is no problem.
52// On 64-bit architectures, defining NULL as a 32-bit constant can cause
53// problems with varargs functions: C++ integral promotion rules say for
54// varargs, we pass the argument 0 as an int.  So, if NULL was passed to a
55// varargs function it will remain 32-bits.  Depending on the calling
56// convention of the machine, if the argument is passed on the stack then
57// only 32-bits of the "NULL" pointer may be initialized to zero.  The
58// other 32-bits will be garbage.  If the varargs function is expecting a
59// pointer when it extracts the argument, then we may have a problem.
60//
61// Solution: For 64-bit architectures, redefine NULL as 64-bit constant 0.
62#ifdef _LP64
63#undef NULL
64// 64-bit Windows uses a P64 data model (not LP64, although we define _LP64)
65// Since longs are 32-bit we cannot use 0L here.  Use the Visual C++ specific
66// 64-bit integer-suffix (i64) instead.
67#define NULL 0i64
68#else
69#ifndef NULL
70#define NULL 0
71#endif
72#endif
73
74// NULL vs NULL_WORD:
75// On Linux NULL is defined as a special type '__null'. Assigning __null to
76// integer variable will cause gcc warning. Use NULL_WORD in places where a
77// pointer is stored as integer value.
78#define NULL_WORD NULL
79
80// Compiler-specific primitive types
81typedef unsigned __int8  uint8_t;
82typedef unsigned __int16 uint16_t;
83typedef unsigned __int32 uint32_t;
84typedef unsigned __int64 uint64_t;
85
86#ifdef _WIN64
87typedef unsigned __int64 uintptr_t;
88#else
89typedef unsigned int uintptr_t;
90#endif
91typedef signed   __int8  int8_t;
92typedef signed   __int16 int16_t;
93typedef signed   __int32 int32_t;
94typedef signed   __int64 int64_t;
95#ifdef _WIN64
96typedef signed   __int64 intptr_t;
97typedef signed   __int64 ssize_t;
98#else
99typedef signed   int intptr_t;
100typedef signed   int ssize_t;
101#endif
102
103#ifndef UINTPTR_MAX
104#ifdef _WIN64
105#define UINTPTR_MAX _UI64_MAX
106#else
107#define UINTPTR_MAX _UI32_MAX
108#endif
109#endif
110
111//----------------------------------------------------------------------------------------------------
112// Additional Java basic types
113
114typedef unsigned char    jubyte;
115typedef unsigned short   jushort;
116typedef unsigned int     juint;
117typedef unsigned __int64 julong;
118
119//----------------------------------------------------------------------------------------------------
120// Special (possibly not-portable) casts
121// Cast floats into same-size integers and vice-versa w/o changing bit-pattern
122
123inline jint    jint_cast   (jfloat  x)           { return *(jint*   )&x; }
124inline jlong   jlong_cast  (jdouble x)           { return *(jlong*  )&x; }
125
126inline jfloat  jfloat_cast (jint    x)           { return *(jfloat* )&x; }
127inline jdouble jdouble_cast(jlong   x)           { return *(jdouble*)&x; }
128
129
130//----------------------------------------------------------------------------------------------------
131// Non-standard stdlib-like stuff:
132inline int strcasecmp(const char *s1, const char *s2) { return _stricmp(s1,s2); }
133inline int strncasecmp(const char *s1, const char *s2, size_t n) {
134  return _strnicmp(s1,s2,n);
135}
136
137
138//----------------------------------------------------------------------------------------------------
139// Debugging
140
141#if _WIN64
142extern "C" void breakpoint();
143#define BREAKPOINT ::breakpoint()
144#else
145#define BREAKPOINT __asm { int 3 }
146#endif
147
148//----------------------------------------------------------------------------------------------------
149// Checking for nanness
150
151inline int g_isnan(jfloat  f)                    { return _isnan(f); }
152inline int g_isnan(jdouble f)                    { return _isnan(f); }
153
154//----------------------------------------------------------------------------------------------------
155// Checking for finiteness
156
157inline int g_isfinite(jfloat  f)                 { return _finite(f); }
158inline int g_isfinite(jdouble f)                 { return _finite(f); }
159
160//----------------------------------------------------------------------------------------------------
161// Constant for jlong (specifying an long long constant is C++ compiler specific)
162
163// Build a 64bit integer constant on with Visual C++
164#define CONST64(x)  (x ## i64)
165#define UCONST64(x) ((uint64_t)CONST64(x))
166
167const jlong min_jlong = CONST64(0x8000000000000000);
168const jlong max_jlong = CONST64(0x7fffffffffffffff);
169
170//----------------------------------------------------------------------------------------------------
171// Miscellaneous
172
173// Visual Studio 2005 deprecates POSIX names - use ISO C++ names instead
174#if _MSC_VER >= 1400
175#define open _open
176#define close _close
177#define read  _read
178#define write _write
179#define lseek _lseek
180#define unlink _unlink
181#define strdup _strdup
182#endif
183
184#pragma warning( disable : 4100 ) // unreferenced formal parameter
185#pragma warning( disable : 4127 ) // conditional expression is constant
186#pragma warning( disable : 4514 ) // unreferenced inline function has been removed
187#pragma warning( disable : 4244 ) // possible loss of data
188#pragma warning( disable : 4512 ) // assignment operator could not be generated
189#pragma warning( disable : 4201 ) // nonstandard extension used : nameless struct/union (needed in windows.h)
190#pragma warning( disable : 4511 ) // copy constructor could not be generated
191#pragma warning( disable : 4291 ) // no matching operator delete found; memory will not be freed if initialization thows an exception
192#ifdef CHECK_UNHANDLED_OOPS
193#pragma warning( disable : 4521 ) // class has multiple copy ctors of a single type
194#pragma warning( disable : 4522 ) // class has multiple assignment operators of a single type
195#endif // CHECK_UNHANDLED_OOPS
196#if _MSC_VER >= 1400
197#pragma warning( disable : 4996 ) // unsafe string functions. Same as define _CRT_SECURE_NO_WARNINGS/_CRT_SECURE_NO_DEPRICATE
198#endif
199
200inline int vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) {
201  // If number of characters written == count, Windows doesn't write a
202  // terminating NULL, so we do it ourselves.
203  int ret = _vsnprintf(buf, count, fmt, argptr);
204  if (count > 0) buf[count-1] = '\0';
205  return ret;
206}
207
208// Portability macros
209#define PRAGMA_INTERFACE
210#define PRAGMA_IMPLEMENTATION
211#define PRAGMA_IMPLEMENTATION_(arg)
212#define VALUE_OBJ_CLASS_SPEC    : public _ValueObj
213
214// Formatting.
215#define FORMAT64_MODIFIER "I64"
216
217// Visual Studio doesn't provide inttypes.h so provide appropriate definitions here.
218// The 32 bits ones might need I32 but seem to work ok without it.
219#define PRId32       "d"
220#define PRIu32       "u"
221#define PRIx32       "x"
222
223#define PRId64       "I64d"
224#define PRIu64       "I64u"
225#define PRIx64       "I64x"
226
227#ifdef _LP64
228#define PRIdPTR       "I64d"
229#define PRIuPTR       "I64u"
230#define PRIxPTR       "I64x"
231#else
232#define PRIdPTR       "d"
233#define PRIuPTR       "u"
234#define PRIxPTR       "x"
235#endif
236
237#define offset_of(klass,field) offsetof(klass,field)
238
239#endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_VISCPP_HPP
240