From: David Goulet <david.goulet@polymtl.ca>
Date: Thu, 1 Sep 2011 17:58:40 +0000 (-0400)
Subject: Add the notify UST application scheme
X-Git-Tag: v2.0-pre13~17
X-Git-Url: https://git.lttng.org/?a=commitdiff_plain;h=0fdd1e2c4a9f725daed3f91dd4f5609ae54ebe93;hp=0fdd1e2c4a9f725daed3f91dd4f5609ae54ebe93;p=lttng-tools.git

Add the notify UST application scheme

This commit introduce the use of a wait shm futex that is used to notify
applications that the session daemon is running and ready to accept
registrations. See shm.c/.h for those calls and the new
futex_wait_update() in futex.c. This scheme is also found in lttng-ust
2.0 and mainly taken from there.

Also, enable-channel of the lttng client was modified to accept UST PID
domain. It's the first phase for testing UST features of the
liblttngctl.

Signed-off-by: David Goulet <david.goulet@polymtl.ca>
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