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The FSF's address changed, and we had a mixture of comment styles for
the GPL file header. (The style with * at the beginning won out with
580 to 141 in existing files.)
Note: I've intentionally left intact other "variations" of the copyright
header, e.g. whether it says "Zebra", "Quagga", "FRR", or nothing.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Adds infrastructure for keeping track of pthreads.
The general idea is to maintain a daemon-wide table of all pthreads,
running or not. A pthread is associated with its own thread master that
can be used with existing thread.c code, which provides user-space
timers, an event loop, non-blocking I/O callbacks and other facilities.
Each frr_pthread has a unique identifier that can be used to fetch it
from the table. This is to allow naming threads using a macro, for
example:
#define WRITE_THREAD 0
#define READ_THREAD 1
#define WORK_THREAD 2
The idea here is to be relatively flexible with regard to how daemons
manage their collection of pthreads; the implementation could get away
with just some #define'd constants, or keep a dynamically allocated data
structure that provides organization, searching, prioritizing, etc.
Overall this interface should provide a way to maintain the familiar
thread.c userspace threading model while progressively introducing
pthreads.
Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>
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