Module: xenomai-jki
Branch: for-upstream
Commit: 45378a6fc17ad9db375de73578b2a9e0072c6b9c
URL:
http://git.xenomai.org/?p=xenomai-jki.git;a=commit;h=45378a6fc17ad9db375de73578b2a9e0072c6b9c
Author: Jan Kiszka <jan.kis...@siemens.com>
Date: Tue Apr 20 01:19:08 2010 +0200
RTDM: Restrict use of rtdm_rt_capable
To avoid use of this service in meaningless contexts, force the user to
pass user_info that comes with handler invocations and catch calls over
async contexts. Also drop the module init/cleanup as valid context from
the doc.
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
include/rtdm/rtdm_driver.h | 7 +++++--
ksrc/skins/rtdm/drvlib.c | 6 ++++--
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/include/rtdm/rtdm_driver.h b/include/rtdm/rtdm_driver.h
index 1a4097b..600516f 100644
--- a/include/rtdm/rtdm_driver.h
+++ b/include/rtdm/rtdm_driver.h
@@ -1329,9 +1329,12 @@ static inline int rtdm_in_rt_context(void)
return (rthal_current_domain != rthal_root_domain);
}
-static inline int rtdm_rt_capable(void)
+static inline int rtdm_rt_capable(rtdm_user_info_t *user_info)
{
- return (!xnpod_root_p() || xnshadow_thread(current) != NULL);
+ XENO_ASSERT(RTDM, !xnpod_asynch_p(), return 0;);
+
+ return (!xnpod_root_p() ||
+ (user_info && xnshadow_thread(user_info) != NULL));
}
#endif /* !DOXYGEN_CPP */
diff --git a/ksrc/skins/rtdm/drvlib.c b/ksrc/skins/rtdm/drvlib.c
index 6e26501..68a661c 100644
--- a/ksrc/skins/rtdm/drvlib.c
+++ b/ksrc/skins/rtdm/drvlib.c
@@ -2344,6 +2344,9 @@ int rtdm_in_rt_context(void);
/**
* Test if the caller is capable of running in real-time context
*
+ * @param[in] user_info User information pointer as passed to the invoked
+ * device operation handler
+ *
* @return Non-zero is returned if the caller is able to execute in real-time
* context (independent of its current execution mode), 0 otherwise.
*
@@ -2358,13 +2361,12 @@ int rtdm_in_rt_context(void);
*
* This service can be called from:
*
- * - Kernel module initialization/cleanup code
* - Kernel-based task
* - User-space task (RT, non-RT)
*
* Rescheduling: never.
*/
-int rtdm_rt_capable(void);
+int rtdm_rt_capable(rtdm_user_info_t *user_info);
#endif /* DOXYGEN_CPP */
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