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/*
* "$Id: globals.c 6649 2007-07-11 21:46:42Z mike $"
*
* Global variable access routines for the Common UNIX Printing System (CUPS).
*
* Copyright 2007 by Apple Inc.
* Copyright 1997-2007 by Easy Software Products, all rights reserved.
*
* These coded instructions, statements, and computer programs are the
* property of Apple Inc. and are protected by Federal copyright
* law. Distribution and use rights are outlined in the file "LICENSE.txt"
* which should have been included with this file. If this file is
* file is missing or damaged, see the license at "http://www.cups.org/".
*
* This file is subject to the Apple OS-Developed Software exception.
*
* Contents:
*
* _cupsGlobals() - Return a pointer to thread local storage.
* cups_env_init() - Initialize environment variables.
* globals_init() - Initialize globals once.
* globals_destructor() - Free memory allocated by _cupsGlobals().
*/
/*
* Include necessary headers...
*/
#include "http-private.h"
#include "globals.h"
#include "debug.h"
#include <stdlib.h>
/*
* 'cups_env_init()' - Initialize environment variables.
*/
static void
cups_env_init(_cups_globals_t *g) /* I - Global data */
{
if ((g->cups_datadir = getenv("CUPS_DATADIR")) == NULL)
g->cups_datadir = CUPS_DATADIR;
if ((g->cups_serverbin = getenv("CUPS_SERVERBIN")) == NULL)
g->cups_serverbin = CUPS_SERVERBIN;
if ((g->cups_serverroot = getenv("CUPS_SERVERROOT")) == NULL)
g->cups_serverroot = CUPS_SERVERROOT;
if ((g->cups_statedir = getenv("CUPS_STATEDIR")) == NULL)
g->cups_statedir = CUPS_STATEDIR;
if ((g->localedir = getenv("LOCALEDIR")) == NULL)
g->localedir = CUPS_LOCALEDIR;
}
#ifdef HAVE_PTHREAD_H
/*
* Implement per-thread globals...
*/
/*
* Local globals...
*/
static pthread_key_t globals_key = -1;
/* Thread local storage key */
static pthread_once_t globals_key_once = PTHREAD_ONCE_INIT;
/* One-time initialization object */
/*
* Local functions...
*/
static void globals_init();
static void globals_destructor(void *value);
/*
* '_cupsGlobals()' - Return a pointer to thread local storage
*/
_cups_globals_t * /* O - Pointer to global data */
_cupsGlobals(void)
{
_cups_globals_t *globals; /* Pointer to global data */
/*
* Initialize the global data exactly once...
*/
DEBUG_printf(("_cupsGlobals(): globals_key_once=%d\n", globals_key_once));
pthread_once(&globals_key_once, globals_init);
/*
* See if we have allocated the data yet...
*/
if ((globals = (_cups_globals_t *)pthread_getspecific(globals_key)) == NULL)
{
DEBUG_puts("_cupsGlobals: allocating memory for thread...");
/*
* No, allocate memory as set the pointer for the key...
*/
globals = calloc(1, sizeof(_cups_globals_t));
pthread_setspecific(globals_key, globals);
DEBUG_printf((" globals=%p\n", globals));
/*
* Initialize variables that have non-zero values
*/
globals->encryption = (http_encryption_t)-1;
globals->password_cb = _cupsGetPassword;
cups_env_init(globals);
}
/*
* Return the pointer to the data...
*/
return (globals);
}
/*
* 'globals_init()' - Initialize globals once.
*/
static void
globals_init()
{
pthread_key_create(&globals_key, globals_destructor);
DEBUG_printf(("globals_init(): globals_key=%x(%u)\n", globals_key,
globals_key));
}
/*
* 'globals_destructor()' - Free memory allocated by _cupsGlobals().
*/
static void
globals_destructor(void *value) /* I - Data to free */
{
int i; /* Looping var */
_cups_globals_t *cg; /* Global data */
DEBUG_printf(("globals_destructor(value=%p)\n", value));
cg = (_cups_globals_t *)value;
httpClose(cg->http);
for (i = 0; i < 3; i ++)
cupsFileClose(cg->stdio_files[i]);
if (cg->last_status_message)
free(cg->last_status_message);
cupsFreeOptions(cg->cupsd_num_settings, cg->cupsd_settings);
free(value);
}
#else
/*
* Implement static globals...
*/
/*
* '_cupsGlobals()' - Return a pointer to thread local storage.
*/
_cups_globals_t * /* O - Pointer to global data */
_cupsGlobals(void)
{
static _cups_globals_t globals; /* Global data */
static int initialized = 0;/* Global data initialized? */
/*
* Initialize global data as needed...
*/
if (!initialized)
{
initialized = 1;
/*
* Initialize global variables...
*/
memset(&globals, 0, sizeof(globals));
globals.encryption = (http_encryption_t)-1;
globals.password_cb = _cupsGetPassword;
cups_env_init(&globals);
}
return (&globals);
}
#endif /* HAVE_PTHREAD_H */
/*
* End of "$Id: globals.c 6649 2007-07-11 21:46:42Z mike $".
*/
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