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190 lines
6.7 KiB
190 lines
6.7 KiB
/**************************************************************************** |
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* sched/sig_internal.h |
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* |
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* Copyright (C) 2007-2009 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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#ifndef __SCHED_SIG_INTERNAL_H |
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#define __SCHED_SIG_INTERNAL_H |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <nuttx/compiler.h> |
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#include <stdint.h> |
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#include <queue.h> |
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#include <sched.h> |
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#include <nuttx/kmalloc.h> |
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/**************************************************************************** |
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* Definitions |
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****************************************************************************/ |
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/* The following definition determines the number of signal structures to |
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* allocate in a block |
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*/ |
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#define NUM_SIGNAL_ACTIONS 16 |
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#define NUM_PENDING_ACTIONS 16 |
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#define NUM_PENDING_INT_ACTIONS 8 |
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#define NUM_SIGNALS_PENDING 16 |
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#define NUM_INT_SIGNALS_PENDING 8 |
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/**************************************************************************** |
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* Public Type Definitions |
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****************************************************************************/ |
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enum sigalloc_e |
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{ |
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SIG_ALLOC_FIXED = 0, /* pre-allocated; never freed */ |
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SIG_ALLOC_DYN, /* dynamically allocated; free when unused */ |
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SIG_ALLOC_IRQ /* Preallocated, reserved for interrupt handling */ |
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}; |
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typedef enum sigalloc_e sigalloc_t; |
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/* The following defines the sigaction queue entry */ |
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struct sigactq |
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{ |
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FAR struct sigactq *flink; /* Forward link */ |
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struct sigaction act; /* Sigaction data */ |
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uint8_t signo; /* Signal associated with action */ |
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}; |
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typedef struct sigactq sigactq_t; |
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/* The following defines the queue structure within each TCB to hold pending |
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* signals received by the task. These are signals that cannot be processed |
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* because: (1) the task is not waiting for them, or (2) the task has no |
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* action associated with the signal. |
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*/ |
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struct sigpendq |
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{ |
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FAR struct sigpendq *flink; /* Forward link */ |
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siginfo_t info; /* Signal information */ |
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uint8_t type; /* (Used to manage allocations) */ |
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}; |
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typedef struct sigpendq sigpendq_t; |
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/* The following defines the queue structure within each TCB to hold queued |
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* signal actions that need action by the task |
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*/ |
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struct sigq_s |
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{ |
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FAR struct sigq_s *flink; /* Forward link */ |
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union |
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{ |
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void (*sighandler)(int signo, siginfo_t *info, void *context); |
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} action; /* Signal action */ |
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sigset_t mask; /* Additional signals to mask while the |
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* the signal-catching function executes */ |
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siginfo_t info; /* Signal information */ |
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uint8_t type; /* (Used to manage allocations) */ |
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}; |
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typedef struct sigq_s sigq_t; |
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/**************************************************************************** |
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* Global Variables |
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****************************************************************************/ |
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/* The g_sigfreeaction data structure is a list of available signal action |
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* structures. |
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*/ |
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extern sq_queue_t g_sigfreeaction; |
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/* The g_sigpendingaction data structure is a list of available pending |
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* signal action structures. |
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*/ |
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extern sq_queue_t g_sigpendingaction; |
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/* The g_sigpendingirqaction is a list of available pending signal actions |
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* that are reserved for use by interrupt handlers. |
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*/ |
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extern sq_queue_t g_sigpendingirqaction; |
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/* The g_sigpendingsignal data structure is a list of available pending |
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* signal structures. |
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*/ |
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extern sq_queue_t g_sigpendingsignal; |
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/* The g_sigpendingirqsignal data structure is a list of available pending |
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* signal structures that are reserved for use by interrupt handlers. |
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*/ |
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extern sq_queue_t g_sigpendingirqsignal; |
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/**************************************************************************** |
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* Public Function Prototypes |
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****************************************************************************/ |
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/* Internal signal-related interfaces ***************************************/ |
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/* sig_intialize.c */ |
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void weak_function sig_initialize(void); |
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void sig_allocateactionblock(void); |
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/* sig_action.c */ |
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void sig_releaseaction(FAR sigactq_t *sigact); |
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/* sig_pending.c */ |
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sigset_t sig_pendingset(FAR _TCB *stcb); |
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/* In files of the same name */ |
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FAR sigq_t *sig_allocatependingsigaction(void); |
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void sig_cleanup(FAR _TCB *stcb); |
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void sig_deliver(FAR _TCB *stcb); |
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FAR sigactq_t *sig_findaction(FAR _TCB *stcb, int signo); |
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int sig_lowest(FAR sigset_t *set); |
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#ifdef CONFIG_CAN_PASS_STRUCTS |
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int sig_mqnotempty(int tid, int signo, union sigval value); |
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#else |
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int sig_mqnotempty(int tid, int signo, FAR void *sival_ptr); |
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#endif |
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int sig_received(FAR _TCB *stcb, FAR siginfo_t *info); |
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void sig_releasependingsigaction(FAR sigq_t *sigq); |
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void sig_releasependingsignal(FAR sigpendq_t *sigpend); |
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FAR sigpendq_t *sig_removependingsignal(FAR _TCB *stcb, int signo); |
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void sig_unmaskpendingsignal(void); |
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#endif /* __SCHED_SIG_INTERNAL_H */
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