/*
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* Copyright (C) 2009 Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>.
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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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* 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 Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*/
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#ifndef _LIB_COBALT_CURRENT_H
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#define _LIB_COBALT_CURRENT_H
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#include <stdint.h>
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#include <pthread.h>
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#include <cobalt/uapi/thread.h>
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#include <xeno_config.h>
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extern pthread_key_t cobalt_current_window_key;
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xnhandle_t cobalt_get_current_slow(void);
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#ifdef HAVE_TLS
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extern __thread __attribute__ ((tls_model (CONFIG_XENO_TLS_MODEL)))
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xnhandle_t cobalt_current;
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extern __thread __attribute__ ((tls_model (CONFIG_XENO_TLS_MODEL)))
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struct xnthread_user_window *cobalt_current_window;
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static inline xnhandle_t cobalt_get_current(void)
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{
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return cobalt_current;
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}
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static inline xnhandle_t cobalt_get_current_fast(void)
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{
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return cobalt_get_current();
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}
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static inline int cobalt_get_current_mode(void)
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{
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return cobalt_current_window ? cobalt_current_window->state : XNRELAX;
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}
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static inline struct xnthread_user_window *cobalt_get_current_window(void)
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{
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return cobalt_current ? cobalt_current_window : NULL;
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}
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#else /* ! HAVE_TLS */
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extern pthread_key_t cobalt_current_key;
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xnhandle_t cobalt_get_current_slow(void);
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static inline xnhandle_t cobalt_get_current(void)
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{
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void *val = pthread_getspecific(cobalt_current_key);
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return (xnhandle_t)(uintptr_t)val ?: cobalt_get_current_slow();
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}
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/* syscall-free, but unreliable in TSD destructor context */
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static inline xnhandle_t cobalt_get_current_fast(void)
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{
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void *val = pthread_getspecific(cobalt_current_key);
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return (xnhandle_t)(uintptr_t)val ?: XN_NO_HANDLE;
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}
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static inline int cobalt_get_current_mode(void)
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{
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struct xnthread_user_window *window;
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window = pthread_getspecific(cobalt_current_window_key);
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return window ? window->state : XNRELAX;
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}
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static inline struct xnthread_user_window *cobalt_get_current_window(void)
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{
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return pthread_getspecific(cobalt_current_window_key);
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}
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#endif /* ! HAVE_TLS */
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void cobalt_init_current_keys(void);
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void cobalt_set_tsd(__u32 u_winoff);
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void cobalt_clear_tsd(void);
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#endif /* _LIB_COBALT_CURRENT_H */
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