base/tasklets/signal.c File Reference

#include <linux/kernel.h>
#include <linux/module.h>
#include <rtai_schedcore.h>
#include <rtai_signal.h>

Include dependency graph for signal.c:

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Data Structures
struct	rt_signal_t
Defines
#define	MODULE_NAME   "RTAI_SIGNALS"
#define	RT_SCHED_SIGSUSP   (1 << 15)
#define	RT_SIGNALS   ((struct rt_signal_t *)task->rt_signals)
Functions
	MODULE_LICENSE ("GPL")
int	rt_request_signal_ (RT_TASK *sigtask, RT_TASK *task, long signal)
	EXPORT_SYMBOL (rt_request_signal_)
void	rt_exec_signal (RT_TASK *sigtask, RT_TASK *task)
int	rt_release_signal (long signal, RT_TASK *task)
	Release a signal previously requested for a task.
	EXPORT_SYMBOL (rt_release_signal)
void	rt_trigger_signal (long signal, RT_TASK *task)
	Trigger a signal for a task (i.e.
	EXPORT_SYMBOL (rt_trigger_signal)
void	rt_enable_signal (long signal, RT_TASK *task)
	Enable a signal for a task.
	EXPORT_SYMBOL (rt_enable_signal)
void	rt_disable_signal (long signal, RT_TASK *task)
	disable a signal for a task.
	EXPORT_SYMBOL (rt_disable_signal)
int	rt_signal_helper (RT_TASK *task)
int	rt_wait_signal (RT_TASK *sigtask, RT_TASK *task)
	EXPORT_SYMBOL (rt_wait_signal)
void	signal_suprt_fun (struct sigsuprt_t *funarg)
int	rt_request_signal (long signal, void(*sighdl)(long, RT_TASK *))
	Install a handler for catching RTAI real time async signals.
int	init_module (void)
void	cleanup_module (void)
Variables
rt_fun_entry	rtai_signals_fun []

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Define Documentation

#define MODULE_NAME   "RTAI_SIGNALS"

Definition at line 27 of file signal.c. Referenced by cleanup_module(), and init_module().

#define RT_SCHED_SIGSUSP   (1 << 15)

Definition at line 29 of file signal.c. Referenced by rt_exec_signal(), and rt_wait_signal().

#define RT_SIGNALS   ((struct rt_signal_t *)task->rt_signals)

Definition at line 31 of file signal.c. Referenced by rt_disable_signal(), rt_enable_signal(), rt_release_signal(), rt_request_signal_(), and rt_trigger_signal().

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Function Documentation

void cleanup_module (  void   )

Definition at line 279 of file signal.c. References MODULE_NAME, printk(), reset_rt_fun_ext_index(), rtai_signals_fun, and RTAI_SIGNALS_IDX. Here is the call graph for this function:

EXPORT_SYMBOL (  rt_wait_signal   )

EXPORT_SYMBOL (  rt_disable_signal   )

EXPORT_SYMBOL (  rt_enable_signal   )

EXPORT_SYMBOL (  rt_trigger_signal   )

EXPORT_SYMBOL (  rt_release_signal   )

EXPORT_SYMBOL (  rt_request_signal_   )

int init_module (  void   )

Definition at line 269 of file signal.c. References MODULE_NAME, printk(), rtai_signals_fun, RTAI_SIGNALS_IDX, and set_rt_fun_ext_index(). Here is the call graph for this function:

MODULE_LICENSE (  "GPL"   )

void rt_disable_signal (  long  signal, RT_TASK *  task )

disable a signal for a task. Parameters: signal,>=  0, is the signal. task  is the task which signal is enabled. A call of this function will disable reception of the related signal by task. Definition at line 172 of file signal.c. References flags, RT_SIGNALS, RT_TASK, and task.

void rt_enable_signal (  long  signal, RT_TASK *  task )

Enable a signal for a task. Parameters: signal,>=  0, is the signal. task  is the task which signal is enabled. A call of this function will enable reception of the related signal by task. Definition at line 149 of file signal.c. References flags, RT_SIGNALS, RT_TASK, and task.

void rt_exec_signal (  RT_TASK *  sigtask, RT_TASK *  task )  [inline, static]

Definition at line 54 of file signal.c. References flags, RT_SCHED_SIGSUSP, RT_TASK, and task. Referenced by rt_release_signal(), and rt_trigger_signal().

int rt_release_signal (  long  signal, RT_TASK *  task )

Release a signal previously requested for a task. Parameters: signal,>=  0, is the signal. task  is the task for which the signal was previously requested. A call of this function will release a signal previously requested for a task. Return values: 0  on success. Returns: -EINVAL in case of error. Definition at line 90 of file signal.c. References rt_exec_signal(), RT_SIGNALS, RT_TASK, and task. Here is the call graph for this function:

int rt_request_signal (  long  signal, void(*  sighdl)(long, RT_TASK *) )

Install a handler for catching RTAI real time async signals. Parameters: signal,>=  0, is the signal. sighdl  is the handler that will execute upon signal reception. RTAI real time signal handlers are executed within a host hard real time thread, assigned to the same CPU of the receiving task, while the task receiving the signal is kept stopped. No difference between kernel and user space, the usual symmetric usage. If the request is succesfull the function will return with signal reception enabled. Return values: 0  on success. Returns: -EINVAL in case of error. Definition at line 243 of file signal.c. References rt_malloc(), RT_TASK, rt_task_init_cpuid(), rt_task_resume(), rt_task_suspend(), signal_suprt_fun(), SIGNAL_TASK_STACK_SIZE, and task. Here is the call graph for this function:

int rt_request_signal_ (  RT_TASK *  sigtask, RT_TASK *  task, long  signal )  [static]

Definition at line 34 of file signal.c. References rt_malloc(), RT_SIGNALS, RT_TASK, rt_task_resume(), and task. Referenced by signal_suprt_fun(). Here is the call graph for this function:

int rt_signal_helper (  RT_TASK *  task  )  [static]

Definition at line 183 of file signal.c. References RT_TASK, rt_task_suspend(), and task. Here is the call graph for this function:

void rt_trigger_signal (  long  signal, RT_TASK *  task )

Trigger a signal for a task (i.e. send a signal to the task), executing the related handler. Parameters: signal,>=  0, is the signal. task  is the task to which the signal is sent. A call of this function will stop the task served by signal, if executing, till the triggered handler has finished its execution, carried out at the same priority and on the same CPU of the task it is serving. Definition at line 118 of file signal.c. References flags, rt_exec_signal(), RT_SIGNALS, RT_TASK, and task. Here is the call graph for this function:

int rt_wait_signal (  RT_TASK *  sigtask, RT_TASK *  task )

Definition at line 192 of file signal.c. References flags, RT_SCHED_READY, RT_SCHED_SIGSUSP, rt_schedule(), RT_TASK, and task. Referenced by signal_suprt_fun(). Here is the call graph for this function:

void signal_suprt_fun (  struct sigsuprt_t *  funarg  )  [static]

Definition at line 210 of file signal.c. References rt_request_signal_(), rt_task_resume(), rt_wait_signal(), sigsuprt_t::sighdl, sigsuprt_t::signal, sigsuprt_t::sigtask, and sigsuprt_t::task. Referenced by rt_request_signal(). Here is the call graph for this function:

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Variable Documentation

struct rt_fun_entry rtai_signals_fun[] [static]

Initial value: { [SIGNAL_HELPER] = { 1, rt_signal_helper }, [SIGNAL_WAITSIG] = { 1, rt_wait_signal }, [SIGNAL_REQUEST] = { 1, rt_request_signal_ }, [SIGNAL_RELEASE] = { 1, rt_release_signal }, [SIGNAL_ENABLE] = { 1, rt_enable_signal }, [SIGNAL_DISABLE] = { 1, rt_disable_signal }, [SIGNAL_TRIGGER] = { 1, rt_trigger_signal } } Definition at line 259 of file signal.c. Referenced by cleanup_module(), and init_module().

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