hotspot/src/share/vm/utilities/globalDefinitions_sparcWorks.hpp
author dcubed
Wed, 12 Mar 2008 18:37:03 -0700
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6452081: 3/4 Allow for Linux builds with Sun Studio Linux compilers Summary: (for Serguei) Allow for Linux builds with Sun Studio Linux compilers Reviewed-by: sspitsyn, ohair
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/*
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 * Copyright 1997-2007 Sun Microsystems, Inc.  All Rights Reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 *
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 */
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// This file holds compiler-dependent includes,
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// globally used constants & types, class (forward)
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// declarations and a few frequently used utility functions.
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# include <ctype.h>
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# include <dirent.h>
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# include <string.h>
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# include <strings.h>     // for bsd'isms
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# include <stdarg.h>
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# include <stddef.h>      // for offsetof
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# include <stdio.h>
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# include <stdlib.h>
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# include <wchar.h>
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# include <stdarg.h>
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#ifdef SOLARIS
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# include <ieeefp.h>
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#endif
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# include <math.h>
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#ifdef LINUX
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#ifndef FP_PZERO
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  // Linux doesn't have positive/negative zero
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  #define FP_PZERO FP_ZERO
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#endif
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#ifndef fpclass
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  #define fpclass fpclassify
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#endif
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#endif
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# include <time.h>
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# include <fcntl.h>
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# include <dlfcn.h>
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# include <pthread.h>
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#ifdef SOLARIS
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# include <thread.h>
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#endif
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# include <limits.h>
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# include <errno.h>
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#ifdef SOLARIS
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# include <sys/trap.h>
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# include <sys/regset.h>
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# include <sys/procset.h>
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# include <ucontext.h>
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# include <setjmp.h>
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#endif
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# ifdef SOLARIS_MUTATOR_LIBTHREAD
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# include <sys/procfs.h>
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# endif
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#ifdef LINUX
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# include <inttypes.h>
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# include <signal.h>
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# include <ucontext.h>
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# include <sys/time.h>
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#endif
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// 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures
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// When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in
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// system header files.  On 32-bit architectures, there is no problem.
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// On 64-bit architectures, defining NULL as a 32-bit constant can cause
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// problems with varargs functions: C++ integral promotion rules say for
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// varargs, we pass the argument 0 as an int.  So, if NULL was passed to a
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// varargs function it will remain 32-bits.  Depending on the calling
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// convention of the machine, if the argument is passed on the stack then
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// only 32-bits of the "NULL" pointer may be initialized to zero.  The
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// other 32-bits will be garbage.  If the varargs function is expecting a
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// pointer when it extracts the argument, then we have a problem.
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//
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// Solution: For 64-bit architectures, redefine NULL as 64-bit constant 0.
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//
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// Note: this fix doesn't work well on Linux because NULL will be overwritten
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// whenever a system header file is included. Linux handles NULL correctly
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// through a special type '__null'.
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#ifdef SOLARIS
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#ifdef _LP64
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#undef NULL
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#define NULL 0L
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#else
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#ifndef NULL
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#define NULL 0
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#endif
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#endif
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#endif
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// NULL vs NULL_WORD:
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// On Linux NULL is defined as a special type '__null'. Assigning __null to
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// integer variable will cause gcc warning. Use NULL_WORD in places where a
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// pointer is stored as integer value. On some platforms, sizeof(intptr_t) >
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// sizeof(void*), so here we want something which is integer type, but has the
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// same size as a pointer.
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#ifdef LINUX
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  #ifdef _LP64
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    #define NULL_WORD  0L
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  #else
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    #define NULL_WORD  0
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  #endif
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#else
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  #define NULL_WORD  NULL
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#endif
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#ifndef LINUX
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// Compiler-specific primitive types
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typedef unsigned short     uint16_t;
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#ifndef _UINT32_T
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#define _UINT32_T
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typedef unsigned int       uint32_t;
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#endif
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#if !defined(_SYS_INT_TYPES_H)
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#ifndef _UINT64_T
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#define _UINT64_T
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typedef unsigned long long uint64_t;
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#endif
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// %%%% how to access definition of intptr_t portably in 5.5 onward?
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typedef int                     intptr_t;
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typedef unsigned int            uintptr_t;
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// If this gets an error, figure out a symbol XXX that implies the
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// prior definition of intptr_t, and add "&& !defined(XXX)" above.
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#endif
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#endif
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// Additional Java basic types
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typedef unsigned char      jubyte;
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typedef unsigned short     jushort;
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typedef unsigned int       juint;
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typedef unsigned long long julong;
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//----------------------------------------------------------------------------------------------------
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// Special (possibly not-portable) casts
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// Cast floats into same-size integers and vice-versa w/o changing bit-pattern
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inline jint    jint_cast   (jfloat  x)           { return *(jint*   )&x; }
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inline jlong   jlong_cast  (jdouble x)           { return *(jlong*  )&x; }
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inline jfloat  jfloat_cast (jint    x)           { return *(jfloat* )&x; }
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inline jdouble jdouble_cast(jlong   x)           { return *(jdouble*)&x; }
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//----------------------------------------------------------------------------------------------------
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// Constant for jlong (specifying an long long constant is C++ compiler specific)
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// Build a 64bit integer constant
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#define CONST64(x)  (x ## LL)
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#define UCONST64(x) (x ## ULL)
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const jlong min_jlong = CONST64(0x8000000000000000);
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const jlong max_jlong = CONST64(0x7fffffffffffffff);
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#ifdef SOLARIS
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//----------------------------------------------------------------------------------------------------
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// ANSI C++ fixes
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// NOTE:In the ANSI committee's continuing attempt to make each version
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// of C++ incompatible with the previous version, you can no longer cast
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// pointers to functions without specifying linkage unless you want to get
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// warnings.
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//
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// This also means that pointers to functions can no longer be "hidden"
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// in opaque types like void * because at the invokation point warnings
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// will be generated. While this makes perfect sense from a type safety
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// point of view it causes a lot of warnings on old code using C header
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// files. Here are some typedefs to make the job of silencing warnings
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// a bit easier.
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//
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// The final kick in the teeth is that you can only have extern "C" linkage
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// specified at file scope. So these typedefs are here rather than in the
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// .hpp for the class (os:Solaris usually) that needs them.
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extern "C" {
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   typedef int (*int_fnP_thread_t_iP_uP_stack_tP_gregset_t)(thread_t, int*, unsigned *, stack_t*, gregset_t);
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   typedef int (*int_fnP_thread_t_i_gregset_t)(thread_t, int, gregset_t);
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   typedef int (*int_fnP_thread_t_i)(thread_t, int);
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   typedef int (*int_fnP_thread_t)(thread_t);
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   typedef int (*int_fnP_cond_tP_mutex_tP_timestruc_tP)(cond_t *cv, mutex_t *mx, timestruc_t *abst);
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   typedef int (*int_fnP_cond_tP_mutex_tP)(cond_t *cv, mutex_t *mx);
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   // typedef for missing API in libc
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   typedef int (*int_fnP_mutex_tP_i_vP)(mutex_t *, int, void *);
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   typedef int (*int_fnP_mutex_tP)(mutex_t *);
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   typedef int (*int_fnP_cond_tP_i_vP)(cond_t *cv, int scope, void *arg);
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   typedef int (*int_fnP_cond_tP)(cond_t *cv);
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};
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#endif
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//----------------------------------------------------------------------------------------------------
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// Debugging
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#define DEBUG_EXCEPTION ::abort();
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extern "C" void breakpoint();
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#define BREAKPOINT ::breakpoint()
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// checking for nanness
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#ifdef SOLARIS
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#ifdef SPARC
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inline int g_isnan(float  f) { return isnanf(f); }
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#else
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// isnanf() broken on Intel Solaris use isnand()
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inline int g_isnan(float  f) { return isnand(f); }
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#endif
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inline int g_isnan(double f) { return isnand(f); }
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#elif LINUX
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inline int g_isnan(float  f) { return isnanf(f); }
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inline int g_isnan(double f) { return isnan(f); }
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#else
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#error "missing platform-specific definition here"
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#endif
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// Checking for finiteness
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inline int g_isfinite(jfloat  f)                 { return finite(f); }
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inline int g_isfinite(jdouble f)                 { return finite(f); }
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// Wide characters
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inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); }
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// Misc
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// NOTE: This one leads to an infinite recursion on Linux
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#ifndef LINUX
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int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr);
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#define vsnprintf local_vsnprintf
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#endif
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// Portability macros
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#define PRAGMA_INTERFACE
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#define PRAGMA_IMPLEMENTATION
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#define PRAGMA_IMPLEMENTATION_(arg)
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#define VALUE_OBJ_CLASS_SPEC    : public _ValueObj
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// Formatting.
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#ifdef _LP64
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#define FORMAT64_MODIFIER "l"
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#else // !_LP64
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#define FORMAT64_MODIFIER "ll"
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#endif // _LP64
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#define offset_of(klass,field) offsetof(klass,field)