mirror of
https://gitlab.gnome.org/GNOME/glib.git
synced 2024-11-10 19:36:18 +01:00
e2fd4e2bd0
Tue Dec 5 12:23:04 2000 Owen Taylor <otaylor@redhat.com>
* gmain.[hc]: Major change in API for creating sources
to handle multiple main loops (GMainContext *).
GSources are now exposed as GSource * and implemented
with structure derivation.
* giochannel.[ch]: Changed vtable for GIOChannel to correspond
to the new mainloop API, add g_io_channel_create_watch().
* gtypes.h: Move GTimeVal here.
* gthread.h: Remove gmain.h include to avoid circularity.
* giounix.c: Update for new GMain API.
* giowin32.c: Update for new GMain API. (No check for
proper compilation or working.)
* timeloop.c timeloop-basic.c: A benchmarking program for
the main loop comparing the main loop against a
hand-written (timeloop-basic.c) variant.
* tests/mainloop-test.c: New torture test of mainloop.
* docs/Changes-2.0.txt: Started. Added text about
changes to GMain.
* gmain.c (g_main_add_poll_unlocked): Initial fd->revents
to zero. (#8482, Benjamin Kahn)
329 lines
11 KiB
C
329 lines
11 KiB
C
/* GLIB - Library of useful routines for C programming
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GLib Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GLib Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GLib at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#ifndef __G_TYPES_H__
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#define __G_TYPES_H__
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#include <glibconfig.h>
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G_BEGIN_DECLS
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/* Provide type definitions for commonly used types.
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* These are useful because a "gint8" can be adjusted
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* to be 1 byte (8 bits) on all platforms. Similarly and
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* more importantly, "gint32" can be adjusted to be
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* 4 bytes (32 bits) on all platforms.
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*/
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typedef char gchar;
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typedef short gshort;
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typedef long glong;
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typedef int gint;
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typedef gint gboolean;
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typedef gchar* gstring;
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typedef unsigned char guchar;
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typedef unsigned short gushort;
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typedef unsigned long gulong;
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typedef unsigned int guint;
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typedef float gfloat;
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typedef double gdouble;
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/* HAVE_LONG_DOUBLE doesn't work correctly on all platforms.
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* Since gldouble isn't used anywhere, just disable it for now */
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#if 0
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#ifdef HAVE_LONG_DOUBLE
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typedef long double gldouble;
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#else /* HAVE_LONG_DOUBLE */
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typedef double gldouble;
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#endif /* HAVE_LONG_DOUBLE */
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#endif /* 0 */
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typedef void* gpointer;
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typedef const void *gconstpointer;
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typedef gint (*GCompareFunc) (gconstpointer a,
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gconstpointer b);
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typedef gint (*GCompareFuncData) (gconstpointer a,
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gconstpointer b,
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gpointer user_data);
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typedef gboolean (*GEqualFunc) (gconstpointer a,
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gconstpointer b);
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typedef void (*GDestroyNotify) (gpointer data);
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typedef void (*GFunc) (gpointer data,
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gpointer user_data);
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typedef guint (*GHashFunc) (gconstpointer key);
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typedef void (*GHFunc) (gpointer key,
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gpointer value,
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gpointer user_data);
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typedef void (*GFreeFunc) (gpointer data);
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/* Define some mathematical constants that aren't available
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* symbolically in some strict ISO C implementations.
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*/
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#define G_E 2.7182818284590452354E0
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#define G_LN2 6.9314718055994530942E-1
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#define G_LN10 2.3025850929940456840E0
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#define G_PI 3.14159265358979323846E0
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#define G_PI_2 1.57079632679489661923E0
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#define G_PI_4 0.78539816339744830962E0
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#define G_SQRT2 1.4142135623730950488E0
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/* Portable endian checks and conversions
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*
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* glibconfig.h defines G_BYTE_ORDER which expands to one of
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* the below macros.
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*/
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#define G_LITTLE_ENDIAN 1234
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#define G_BIG_ENDIAN 4321
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#define G_PDP_ENDIAN 3412 /* unused, need specific PDP check */
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/* Basic bit swapping functions
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*/
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#define GUINT16_SWAP_LE_BE_CONSTANT(val) ((guint16) ( \
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(((guint16) (val) & (guint16) 0x00ffU) << 8) | \
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(((guint16) (val) & (guint16) 0xff00U) >> 8)))
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#define GUINT32_SWAP_LE_BE_CONSTANT(val) ((guint32) ( \
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(((guint32) (val) & (guint32) 0x000000ffU) << 24) | \
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(((guint32) (val) & (guint32) 0x0000ff00U) << 8) | \
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(((guint32) (val) & (guint32) 0x00ff0000U) >> 8) | \
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(((guint32) (val) & (guint32) 0xff000000U) >> 24)))
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/* Intel specific stuff for speed
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*/
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#if defined (__i386__) && defined (__GNUC__) && __GNUC__ >= 2
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# define GUINT16_SWAP_LE_BE_X86(val) \
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(__extension__ \
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({ register guint16 __v; \
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if (__builtin_constant_p (val)) \
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__v = GUINT16_SWAP_LE_BE_CONSTANT (val); \
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else \
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__asm__ __const__ ("rorw $8, %w0" \
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: "=r" (__v) \
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: "0" ((guint16) (val))); \
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__v; }))
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# define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_X86 (val))
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# if !defined(__i486__) && !defined(__i586__) \
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&& !defined(__pentium__) && !defined(__i686__) && !defined(__pentiumpro__)
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# define GUINT32_SWAP_LE_BE_X86(val) \
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(__extension__ \
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({ register guint32 __v; \
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if (__builtin_constant_p (val)) \
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__v = GUINT32_SWAP_LE_BE_CONSTANT (val); \
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else \
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__asm__ __const__ ("rorw $8, %w0\n\t" \
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"rorl $16, %0\n\t" \
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"rorw $8, %w0" \
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: "=r" (__v) \
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: "0" ((guint32) (val))); \
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__v; }))
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# else /* 486 and higher has bswap */
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# define GUINT32_SWAP_LE_BE_X86(val) \
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(__extension__ \
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({ register guint32 __v; \
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if (__builtin_constant_p (val)) \
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__v = GUINT32_SWAP_LE_BE_CONSTANT (val); \
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else \
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__asm__ __const__ ("bswap %0" \
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: "=r" (__v) \
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: "0" ((guint32) (val))); \
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__v; }))
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# endif /* processor specific 32-bit stuff */
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# define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_X86 (val))
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#else /* !__i386__ */
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# define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_CONSTANT (val))
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# define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_CONSTANT (val))
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#endif /* __i386__ */
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#ifdef G_HAVE_GINT64
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# define GUINT64_SWAP_LE_BE_CONSTANT(val) ((guint64) ( \
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(((guint64) (val) & \
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(guint64) G_GINT64_CONSTANT(0x00000000000000ffU)) << 56) | \
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(((guint64) (val) & \
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(guint64) G_GINT64_CONSTANT(0x000000000000ff00U)) << 40) | \
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(((guint64) (val) & \
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(guint64) G_GINT64_CONSTANT(0x0000000000ff0000U)) << 24) | \
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(((guint64) (val) & \
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(guint64) G_GINT64_CONSTANT(0x00000000ff000000U)) << 8) | \
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(((guint64) (val) & \
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(guint64) G_GINT64_CONSTANT(0x000000ff00000000U)) >> 8) | \
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(((guint64) (val) & \
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(guint64) G_GINT64_CONSTANT(0x0000ff0000000000U)) >> 24) | \
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(((guint64) (val) & \
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(guint64) G_GINT64_CONSTANT(0x00ff000000000000U)) >> 40) | \
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(((guint64) (val) & \
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(guint64) G_GINT64_CONSTANT(0xff00000000000000U)) >> 56)))
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# if defined (__i386__) && defined (__GNUC__) && __GNUC__ >= 2
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# define GUINT64_SWAP_LE_BE_X86(val) \
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(__extension__ \
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({ union { guint64 __ll; \
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guint32 __l[2]; } __r; \
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if (__builtin_constant_p (val)) \
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__r.__ll = GUINT64_SWAP_LE_BE_CONSTANT (val); \
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else \
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{ \
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union { guint64 __ll; \
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guint32 __l[2]; } __w; \
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__w.__ll = ((guint64) val); \
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__r.__l[0] = GUINT32_SWAP_LE_BE (__w.__l[1]); \
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__r.__l[1] = GUINT32_SWAP_LE_BE (__w.__l[0]); \
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} \
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__r.__ll; }))
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# define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_X86 (val))
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# else /* !__i386__ */
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# define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_CONSTANT(val))
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# endif
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#endif
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#define GUINT16_SWAP_LE_PDP(val) ((guint16) (val))
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#define GUINT16_SWAP_BE_PDP(val) (GUINT16_SWAP_LE_BE (val))
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#define GUINT32_SWAP_LE_PDP(val) ((guint32) ( \
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(((guint32) (val) & (guint32) 0x0000ffffU) << 16) | \
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(((guint32) (val) & (guint32) 0xffff0000U) >> 16)))
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#define GUINT32_SWAP_BE_PDP(val) ((guint32) ( \
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(((guint32) (val) & (guint32) 0x00ff00ffU) << 8) | \
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(((guint32) (val) & (guint32) 0xff00ff00U) >> 8)))
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/* The G*_TO_?E() macros are defined in glibconfig.h.
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* The transformation is symmetric, so the FROM just maps to the TO.
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*/
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#define GINT16_FROM_LE(val) (GINT16_TO_LE (val))
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#define GUINT16_FROM_LE(val) (GUINT16_TO_LE (val))
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#define GINT16_FROM_BE(val) (GINT16_TO_BE (val))
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#define GUINT16_FROM_BE(val) (GUINT16_TO_BE (val))
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#define GINT32_FROM_LE(val) (GINT32_TO_LE (val))
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#define GUINT32_FROM_LE(val) (GUINT32_TO_LE (val))
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#define GINT32_FROM_BE(val) (GINT32_TO_BE (val))
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#define GUINT32_FROM_BE(val) (GUINT32_TO_BE (val))
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#ifdef G_HAVE_GINT64
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#define GINT64_FROM_LE(val) (GINT64_TO_LE (val))
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#define GUINT64_FROM_LE(val) (GUINT64_TO_LE (val))
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#define GINT64_FROM_BE(val) (GINT64_TO_BE (val))
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#define GUINT64_FROM_BE(val) (GUINT64_TO_BE (val))
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#endif
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#define GLONG_FROM_LE(val) (GLONG_TO_LE (val))
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#define GULONG_FROM_LE(val) (GULONG_TO_LE (val))
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#define GLONG_FROM_BE(val) (GLONG_TO_BE (val))
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#define GULONG_FROM_BE(val) (GULONG_TO_BE (val))
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#define GINT_FROM_LE(val) (GINT_TO_LE (val))
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#define GUINT_FROM_LE(val) (GUINT_TO_LE (val))
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#define GINT_FROM_BE(val) (GINT_TO_BE (val))
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#define GUINT_FROM_BE(val) (GUINT_TO_BE (val))
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/* Portable versions of host-network order stuff
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*/
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#define g_ntohl(val) (GUINT32_FROM_BE (val))
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#define g_ntohs(val) (GUINT16_FROM_BE (val))
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#define g_htonl(val) (GUINT32_TO_BE (val))
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#define g_htons(val) (GUINT16_TO_BE (val))
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/* IEEE Standard 754 Single Precision Storage Format (gfloat):
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*
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* 31 30 23 22 0
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* +--------+---------------+---------------+
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* | s 1bit | e[30:23] 8bit | f[22:0] 23bit |
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* +--------+---------------+---------------+
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* B0------------------->B1------->B2-->B3-->
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*
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* IEEE Standard 754 Double Precision Storage Format (gdouble):
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*
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* 63 62 52 51 32 31 0
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* +--------+----------------+----------------+ +---------------+
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* | s 1bit | e[62:52] 11bit | f[51:32] 20bit | | f[31:0] 32bit |
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* +--------+----------------+----------------+ +---------------+
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* B0--------------->B1---------->B2--->B3----> B4->B5->B6->B7->
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*/
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/* subtract from biased_exponent to form base2 exponent (normal numbers) */
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typedef union _GDoubleIEEE754 GDoubleIEEE754;
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typedef union _GFloatIEEE754 GFloatIEEE754;
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#define G_IEEE754_FLOAT_BIAS (127)
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#define G_IEEE754_DOUBLE_BIAS (1023)
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/* multiply with base2 exponent to get base10 exponent (nomal numbers) */
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#define G_LOG_2_BASE_10 (0.30102999566398119521)
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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union _GFloatIEEE754
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{
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gfloat v_float;
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struct {
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guint mantissa : 23;
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guint biased_exponent : 8;
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guint sign : 1;
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} mpn;
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};
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union _GDoubleIEEE754
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{
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gdouble v_double;
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struct {
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guint mantissa_low : 32;
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guint mantissa_high : 20;
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guint biased_exponent : 11;
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guint sign : 1;
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} mpn;
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};
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#elif G_BYTE_ORDER == G_BIG_ENDIAN
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union _GFloatIEEE754
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{
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gfloat v_float;
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struct {
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guint sign : 1;
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guint biased_exponent : 8;
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guint mantissa : 23;
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} mpn;
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};
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union _GDoubleIEEE754
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{
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gdouble v_double;
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struct {
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guint sign : 1;
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guint biased_exponent : 11;
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guint mantissa_high : 20;
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guint mantissa_low : 32;
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} mpn;
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};
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#else /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
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#error unknown ENDIAN type
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#endif /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
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typedef struct _GTimeVal GTimeVal;
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struct _GTimeVal
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{
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glong tv_sec;
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glong tv_usec;
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};
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G_END_DECLS
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#endif /* __G_TYPES_H__ */
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