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author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /libX11/src/Context.c | |
download | vcxsrv-3562e78743202e43aec8727005182a2558117eca.tar.gz vcxsrv-3562e78743202e43aec8727005182a2558117eca.tar.bz2 vcxsrv-3562e78743202e43aec8727005182a2558117eca.zip |
Checked in the following released items:
xkeyboard-config-1.4.tar.gz
ttf-bitstream-vera-1.10.tar.gz
font-alias-1.0.1.tar.gz
font-sun-misc-1.0.0.tar.gz
font-sun-misc-1.0.0.tar.gz
font-sony-misc-1.0.0.tar.gz
font-schumacher-misc-1.0.0.tar.gz
font-mutt-misc-1.0.0.tar.gz
font-misc-misc-1.0.0.tar.gz
font-misc-meltho-1.0.0.tar.gz
font-micro-misc-1.0.0.tar.gz
font-jis-misc-1.0.0.tar.gz
font-isas-misc-1.0.0.tar.gz
font-dec-misc-1.0.0.tar.gz
font-daewoo-misc-1.0.0.tar.gz
font-cursor-misc-1.0.0.tar.gz
font-arabic-misc-1.0.0.tar.gz
font-winitzki-cyrillic-1.0.0.tar.gz
font-misc-cyrillic-1.0.0.tar.gz
font-cronyx-cyrillic-1.0.0.tar.gz
font-screen-cyrillic-1.0.1.tar.gz
font-xfree86-type1-1.0.1.tar.gz
font-adobe-utopia-type1-1.0.1.tar.gz
font-ibm-type1-1.0.0.tar.gz
font-bitstream-type1-1.0.0.tar.gz
font-bitstream-speedo-1.0.0.tar.gz
font-bh-ttf-1.0.0.tar.gz
font-bh-type1-1.0.0.tar.gz
font-bitstream-100dpi-1.0.0.tar.gz
font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz
font-bh-100dpi-1.0.0.tar.gz
font-adobe-utopia-100dpi-1.0.1.tar.gz
font-adobe-100dpi-1.0.0.tar.gz
font-util-1.0.1.tar.gz
font-bitstream-75dpi-1.0.0.tar.gz
font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz
font-adobe-utopia-75dpi-1.0.1.tar.gz
font-bh-75dpi-1.0.0.tar.gz
bdftopcf-1.0.1.tar.gz
font-adobe-75dpi-1.0.0.tar.gz
mkfontscale-1.0.6.tar.gz
openssl-0.9.8k.tar.gz
bigreqsproto-1.0.2.tar.gz
xtrans-1.2.2.tar.gz
resourceproto-1.0.2.tar.gz
inputproto-1.4.4.tar.gz
compositeproto-0.4.tar.gz
damageproto-1.1.0.tar.gz
zlib-1.2.3.tar.gz
xkbcomp-1.0.5.tar.gz
freetype-2.3.9.tar.gz
pthreads-w32-2-8-0-release.tar.gz
pixman-0.12.0.tar.gz
kbproto-1.0.3.tar.gz
evieext-1.0.2.tar.gz
fixesproto-4.0.tar.gz
recordproto-1.13.2.tar.gz
randrproto-1.2.2.tar.gz
scrnsaverproto-1.1.0.tar.gz
renderproto-0.9.3.tar.gz
xcmiscproto-1.1.2.tar.gz
fontsproto-2.0.2.tar.gz
xextproto-7.0.3.tar.gz
xproto-7.0.14.tar.gz
libXdmcp-1.0.2.tar.gz
libxkbfile-1.0.5.tar.gz
libfontenc-1.0.4.tar.gz
libXfont-1.3.4.tar.gz
libX11-1.1.5.tar.gz
libXau-1.0.4.tar.gz
libxcb-1.1.tar.gz
xorg-server-1.5.3.tar.gz
Diffstat (limited to 'libX11/src/Context.c')
-rw-r--r-- | libX11/src/Context.c | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/libX11/src/Context.c b/libX11/src/Context.c new file mode 100644 index 000000000..747bb6be7 --- /dev/null +++ b/libX11/src/Context.c @@ -0,0 +1,311 @@ +/* $Xorg: Context.c,v 1.5 2001/02/09 02:03:31 xorgcvs Exp $ */ + +/*********************************************************** +Copyright 1987, 1988, 1990 by Digital Equipment Corporation, Maynard, + + All Rights Reserved + +Permission to use, copy, modify, and distribute this software and its +documentation for any purpose and without fee is hereby granted, +provided that the above copyright notice appear in all copies and that +both that copyright notice and this permission notice appear in +supporting documentation, and that the name Digital not be +used in advertising or publicity pertaining to distribution of the +software without specific, written prior permission. + +DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING +ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL +DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR +ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, +WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, +ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS +SOFTWARE. + +******************************************************************/ + +/* + +Copyright 1987, 1988, 1990, 1994, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR +OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, +ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall +not be used in advertising or otherwise to promote the sale, use or +other dealings in this Software without prior written authorization +from The Open Group. + +*/ +/* $XFree86: xc/lib/X11/Context.c,v 1.5 2001/12/14 19:53:58 dawes Exp $ */ + +/* This module implements a simple sparse array. + + XSaveContext(a,b,c,d) will store d in position (a,b,c) of the array. + XFindContext(a,b,c,&d) will set d to be the value in position (a,b,c). + XDeleteContext(a,b,c) will delete the entry in (a,b,c). + + a is a display id, b is a resource id, and c is a Context. d is just an + XPointer. This code will work with any range of parameters, but is geared + to be most efficient with very few (one or two) different a's. + +*/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include "Xlibint.h" +#include "Xutil.h" +#ifdef XTHREADS +#include "locking.h" +#endif + +#define INITHASHMASK 63 /* Number of entries originally in the hash table. */ + +typedef struct _TableEntryRec { /* Stores one entry. */ + XID rid; + XContext context; + XPointer data; + struct _TableEntryRec *next; +} TableEntryRec, *TableEntry; + +typedef struct _XContextDB { /* Stores hash table for one display. */ + TableEntry *table; /* Pointer to array of hash entries. */ + int mask; /* Current size of hash table minus 1. */ + int numentries; /* Number of entries currently in table. */ +#ifdef XTHREADS + LockInfoRec linfo; +#endif +} DBRec, *DB; + +#ifdef MOTIFBC +static DB NullDB = (DB)0; +#endif + +/* Given an XID and a context, returns a value between 0 and HashSize-1. + Currently, this requires that HashSize be a power of 2. +*/ + +#define Hash(db,rid,context) \ + (db)->table[(((rid) << 1) + context) & (db)->mask] + +/* Resize the given db */ + +static void ResizeTable(DB db) +{ + TableEntry *otable; + register TableEntry entry, next, *pold, *head; + register int i, j; + + otable = db->table; + for (i = INITHASHMASK+1; (i + i) < db->numentries; ) + i += i; + db->table = (TableEntry *) Xcalloc((unsigned)i, sizeof(TableEntry)); + if (!db->table) { + db->table = otable; + return; + } + j = db->mask + 1; + db->mask = i - 1; + for (pold = otable ; --j >= 0; pold++) { + for (entry = *pold; entry; entry = next) { + next = entry->next; + head = &Hash(db, entry->rid, entry->context); + entry->next = *head; + *head = entry; + } + } + Xfree((char *) otable); +} + +static void _XFreeContextDB(Display *display) +{ + register DB db; + register int i; + register TableEntry *pentry, entry, next; + + db = display->context_db; + if (db) { + for (i = db->mask + 1, pentry = db->table ; --i >= 0; pentry++) { + for (entry = *pentry; entry; entry = next) { + next = entry->next; + Xfree((char *)entry); + } + } + Xfree((char *) db->table); + _XFreeMutex(&db->linfo); + Xfree((char *) db); + } +} + +/* Public routines. */ + +/* Save the given value of data to correspond with the keys XID and context. + Returns nonzero error code if an error has occured, 0 otherwise. + Possible errors are Out-of-memory. +*/ + +int XSaveContext( + Display *display, + register XID rid, + register XContext context, + _Xconst char* data) +{ + DB *pdb; + register DB db; + TableEntry *head; + register TableEntry entry; + +#ifdef MOTIFBC + if (!display) { + pdb = &NullDB; + db = *pdb; + } else +#endif + { + LockDisplay(display); + pdb = &display->context_db; + db = *pdb; + UnlockDisplay(display); + } + if (!db) { + db = (DB) Xmalloc(sizeof(DBRec)); + if (!db) + return XCNOMEM; + db->mask = INITHASHMASK; + db->table = (TableEntry *)Xcalloc(db->mask + 1, sizeof(TableEntry)); + if (!db->table) { + Xfree((char *)db); + return XCNOMEM; + } + db->numentries = 0; + _XCreateMutex(&db->linfo); +#ifdef MOTIFBC + if (!display) *pdb = db; else +#endif + { + LockDisplay(display); + *pdb = db; + display->free_funcs->context_db = _XFreeContextDB; + UnlockDisplay(display); + } + } + _XLockMutex(&db->linfo); + head = &Hash(db, rid, context); + _XUnlockMutex(&db->linfo); + for (entry = *head; entry; entry = entry->next) { + if (entry->rid == rid && entry->context == context) { + entry->data = (XPointer)data; + return 0; + } + } + entry = (TableEntry) Xmalloc(sizeof(TableEntryRec)); + if (!entry) + return XCNOMEM; + entry->rid = rid; + entry->context = context; + entry->data = (XPointer)data; + entry->next = *head; + *head = entry; + _XLockMutex(&db->linfo); + db->numentries++; + if (db->numentries > (db->mask << 2)) + ResizeTable(db); + _XUnlockMutex(&db->linfo); + return 0; +} + + + +/* Given an XID and context, returns the associated data. Note that data + here is a pointer since it is a return value. Returns nonzero error code + if an error has occured, 0 otherwise. Possible errors are Entry-not-found. +*/ + +int XFindContext(display, rid, context, data) + Display *display; + register XID rid; + register XContext context; + XPointer *data; /* RETURN */ +{ + register DB db; + register TableEntry entry; + +#ifdef MOTIFBC + if (!display) db = NullDB; else +#endif + { + LockDisplay(display); + db = display->context_db; + UnlockDisplay(display); + } + if (!db) + return XCNOENT; + _XLockMutex(&db->linfo); + for (entry = Hash(db, rid, context); entry; entry = entry->next) + { + if (entry->rid == rid && entry->context == context) { + *data = (XPointer)entry->data; + _XUnlockMutex(&db->linfo); + return 0; + } + } + _XUnlockMutex(&db->linfo); + return XCNOENT; +} + + + +/* Deletes the entry for the given XID and context from the datastructure. + This returns the same thing that FindContext would have returned if called + with the same arguments. +*/ + +int XDeleteContext(display, rid, context) + Display *display; + register XID rid; + register XContext context; +{ + register DB db; + register TableEntry entry, *prev; + +#ifdef MOTIFBC + if (!display) db = NullDB; else +#endif + { + LockDisplay(display); + db = display->context_db; + UnlockDisplay(display); + } + if (!db) + return XCNOENT; + _XLockMutex(&db->linfo); + for (prev = &Hash(db, rid, context); + (entry = *prev); + prev = &entry->next) { + if (entry->rid == rid && entry->context == context) { + *prev = entry->next; + Xfree((char *) entry); + db->numentries--; + if (db->numentries < db->mask && db->mask > INITHASHMASK) + ResizeTable(db); + _XUnlockMutex(&db->linfo); + return 0; + } + } + _XUnlockMutex(&db->linfo); + return XCNOENT; +} |