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fixes rhbz 790749 use after free of SpiceChannelEventInfo.
The lifetime of the SpiceChannelEventInfo was that of RedsStream, but it
is used by main_dispatcher_handle_channel_event after the RedsStream is
freed for the cursor and display channels. Making SCEI allocation be at
RedsStream allocation, and deallocation after the DESTROY event is
processed by core->channel_event, fixes use after free.
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Not all files were including config.h
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The assert.h include was never used in any code
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used for main_dispatcher only in this patch.
Dispatcher is meant to be used for Main<->any low frequency messages.
It's interface is meant to include the red_dispatcher usage:
fixed size messages per message type
some messages require an ack
Some methods are added to be used by RedDispatcher later:
dispatcher_handle_read - to be called directly by RedDispatcher epoll
based loop
dispatcher_set_opaque - to be set from red_worker pthread
dispatcher_init - allow NULL core as used by red_worker
Read and Write behavior:
Sender: blocking write, blocking read for ack (if any).
Reader: poll for any data, if such then blocking read for a
message_type and following message. repeat until poll returns
with no pending data to read.
FDO Bugzilla: 42463
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add main_dispatcher, a message passing mechanism for sending messages to
the main thread. The main thread is the thread that implements
SpiceCoreInterface, which is assumed to be a single thread.
Similar to the async operation of red_worker, a socket pair is created
and used to pass messages. The messages are a fixed size to ease
parsing. A single message is defined to pass a channel_event.
RHBZ: 746950
FDBZ: 41858
This patch is 0.8 branch only, for the master branch there should be a
better approach to share code with red_dispatcher and ready the way for
later adding more threads.
cherry-pick from 0.8 80caf07e09efe14c67f89a3c01501a6a39681167
Conflicts:
server/reds.c
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