janwas
2e5d9452aa
move all except user-specified config choices out of config.h and into appropriate headers CPU_IA32 -> ARCH_IA32 wsdl: disable use of ddraw (will soon be replaced by WMI) use shared_ptr without namespace qualifier (it's in tr1) debug_warn -> debug_assert(0) LIB_API to allow building as DLL smart pointers: reduce use of .get() cache_adt: use map instead of hash_map (avoids needing a hashCompare class). also remove spurious warning code_annotation.h: better cassert implementation move FPS measuring portion of timer.cpp into frequency_filter move include of memory headers into mmgr.h (to avoid errors, we must ensure they are included if mmgr is used) posix_filesystem.h: move definition of mkdir to wfilesystem stl: disable iterator checks in release mode wmi: fix COM init bug, use smart pointers wutil: add code to get DLL module handle (if compiled as such), add WinScopedLock timer: fix handling of raw ticks This was SVN commit r5517.
143 lines
4.3 KiB
C++
143 lines
4.3 KiB
C++
/**
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* =========================================================================
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* File : posix.h
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* Project : 0 A.D.
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* Description : definitions for a subset of POSIX.
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* =========================================================================
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*/
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// license: GPL; see lib/license.txt
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/*
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[KEEP IN SYNC WITH WIKI]
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this header makes available commonly used POSIX (Portable Operating System
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Interface) definitions, e.g. thread, file I/O and socket APIs.
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on Linux and OS X we just include the requisite headers; Win32 doesn't really
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support POSIX (*), so we have to implement everything ourselves.
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rationale: this is preferable to a wrapper for several reasons:
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- less code (implementation is only needed on Win32)
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- no lock-in (the abstraction may prevent not-designed-for operations
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that the POSIX interface would have allowed)
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- familiarity (many coders already know POSIX)
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if a useful definition is missing, feel free to add it!
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implementation reference is the "Single Unix Specification v3"
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(http://www.unix.org/online.html) - it's similar to the POSIX standard
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(superset?) and freely available.
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* Win32 does have a POSIX subsystem (mandated by a government contract),
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but it is crippled. only apps with the PE header 'subsystem' field set to
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"POSIX" can use the appendant DLL, and then they can't call the regular
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Windows APIs. this is obviously unacceptable - GDI is needed to set up OpenGL.
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we therefore need to emulate POSIX functions using the Win32 API.
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fortunately, many POSIX functions are already implemented in the VC CRT and
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need only be renamed (e.g. _open, _stat).
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*/
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#ifndef INCLUDED_POSIX
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#define INCLUDED_POSIX
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#include <cmath> // see isfinite comment below
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#if OS_WIN
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# include "lib/sysdep/win/wposix/wposix.h"
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#endif
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#include "posix_types.h"
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#include "posix_aio.h"
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#include "posix_dlfcn.h"
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#include "posix_filesystem.h"
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#include "posix_mman.h"
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#include "posix_pthread.h"
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#include "posix_sock.h"
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#include "posix_terminal.h"
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#include "posix_time.h"
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#include "posix_utsname.h"
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// note: the following need only be #defined (instead of defining a
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// trampoline function) because the redefined functions are already
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// declared by standard headers.
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// provide C99 *snprintf functions if compiler doesn't already
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// (MinGW does, VC7.1 doesn't).
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#if MSC_VERSION
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# define snprintf _snprintf
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# define swprintf _snwprintf
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# define vsnprintf _vsnprintf
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# define vswprintf _vsnwprintf
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#endif
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// VC doesn't define str[n]casecmp
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#if MSC_VERSION
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#define strcasecmp stricmp
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#define strncasecmp strnicmp
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#endif
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#if OS_MACOSX
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# define EMULATE_WCSDUP 1
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#else
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# define EMULATE_WCSDUP 0
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#endif
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#if EMULATE_WCSDUP
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extern wchar_t* wcsdup(const wchar_t* str);
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#endif
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// rint*, fminf, fpclassify (too few/diverse to make separate HAVE_ for each)
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#if HAVE_C99 || GCC_VERSION
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# define HAVE_C99_MATH 1
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#else
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# define HAVE_C99_MATH 0
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#endif
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#if !HAVE_C99_MATH
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// round float to nearest integral value, according to
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// current rounding mode.
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extern float rintf(float f);
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extern double rint(double d);
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// return minimum/maximum of two floats.
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extern float fminf(float a, float b);
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extern float fmaxf(float a, float b);
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extern uint fpclassifyf(float f);
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extern uint fpclassifyd(double d);
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#define fpclassify(x) ( (sizeof(x) == sizeof(float))? fpclassifyf(x) : fpclassifyd(x) )
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// these definitions "happen" to match IA32_FP_* and allow using
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// ia32_fp_classify without having to translate the return value.
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// we don't #define to IA32_FP_* to avoid dependency.
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# define FP_NAN 0x0100
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# define FP_NORMAL 0x0400
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# define FP_INFINITE (FP_NAN | FP_NORMAL)
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# define FP_ZERO 0x4000
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# define FP_SUBNORMAL (FP_NORMAL | FP_ZERO)
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# define isnan(d) (fpclassify(d) == FP_NAN)
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# define isfinite(d) ((fpclassify(d) & (FP_NORMAL|FP_ZERO)) != 0)
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# define isinf(d) (fpclassify(d) == FP_NAN|FP_NORMAL)
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# define isnormal(d) (fpclassify(d) == FP_NORMAL)
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//# define signbit
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#else // HAVE_C99_MATH
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// Some systems have C99 support but in C++ they provide only std::isfinite
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// and not isfinite. C99 specifies that isfinite is a macro, so we can use
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// #ifndef and define it if it's not there already.
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// We've included <cmath> above to make sure it defines that macro.
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# ifndef isfinite
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# define isfinite std::isfinite
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# define isnan std::isnan
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# define isinf std::isinf
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# define isnormal std::isnormal
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# endif
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#endif // HAVE_C99_MATH
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#endif // #ifndef INCLUDED_POSIX
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