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Add a start hook that can be setup to call a function in the context of a new thread before the new threads main() has been called.

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5571 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2013-01-27 15:52:58 +00:00
parent 4c3b71131e
commit 151dfee1f9
15 changed files with 237 additions and 55 deletions
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binfmt/binfmt_execmodule.c
+23 -38
View File
@@ -58,6 +58,14 @@
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* If C++ constructors are used, then CONFIG_SCHED_STARTHOOK must also be
* selected be the start hook is used to schedule execution of the
* constructors.
*/
#if defined(CONFIG_BINFMT_CONSTRUCTORS) && !defined(CONFIG_SCHED_STARTHOOK)
# errror "CONFIG_SCHED_STARTHOOK must be defined to use constructors"
#endif
/****************************************************************************
* Private Function Prototypes
@@ -75,7 +83,9 @@
* Name: exec_ctors
*
* Description:
* Execute C++ static constructors.
* Execute C++ static constructors. This function is registered as a
* start hook and runs on the thread of the newly created task before
* the new task's main function is called.
*
* Input Parameters:
* loadinfo - Load state information
@@ -87,26 +97,12 @@
****************************************************************************/
#ifdef CONFIG_BINFMT_CONSTRUCTORS
static inline int exec_ctors(FAR const struct binary_s *binp)
static void exec_ctors(FAR void *arg)
{
FAR const struct binary_s *binp = (FAR const struct binary_s *)arg;
binfmt_ctor_t *ctor = binp->ctors;
#ifdef CONFIG_ADDRENV
hw_addrenv_t oldenv;
int ret;
#endif
int i;
/* Instantiate the address enviroment containing the constructors */
#ifdef CONFIG_ADDRENV
ret = up_addrenv_select(binp->addrenv, &oldenv);
if (ret < 0)
{
bdbg("up_addrenv_select() failed: %d\n", ret);
return ret;
}
#endif
/* Execute each constructor */
for (i = 0; i < binp->nctors; i++)
@@ -116,14 +112,6 @@ static inline int exec_ctors(FAR const struct binary_s *binp)
(*ctor)();
ctor++;
}
/* Restore the address enviroment */
#ifdef CONFIG_ADDRENV
return up_addrenv_restore(oldenv);
#else
return OK;
#endif
}
#endif
@@ -139,7 +127,7 @@ static inline int exec_ctors(FAR const struct binary_s *binp)
*
* Returned Value:
* This is an end-user function, so it follows the normal convention:
* Returns the PID of the exec'ed module. On failure, it.returns
* Returns the PID of the exec'ed module. On failure, it returns
* -1 (ERROR) and sets errno appropriately.
*
****************************************************************************/
@@ -229,22 +217,19 @@ int exec_module(FAR const struct binary_s *binp)
}
#endif
/* Setup a start hook that will execute all of the C++ static constructors
* on the newly created thread. The struct binary_s must persist at least
* until the new task has been started.
*/
#ifdef CONFIG_BINFMT_CONSTRUCTORS
task_starthook(tcb, exec_ctors, (FAR void *)binp);
#endif
/* Get the assigned pid before we start the task */
pid = tcb->pid;
/* Execute all of the C++ static constructors */
#ifdef CONFIG_BINFMT_CONSTRUCTORS
ret = exec_ctors(binp);
if (ret < 0)
{
err = -ret;
bdbg("exec_ctors() failed: %d\n", ret);
goto errout_with_stack;
}
#endif
/* Then activate the task at the provided priority */
ret = task_activate(tcb);