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bird/sysdep/unix/io-loop.h

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BFD work in progress. Now it compiles and mostly works.
2013-09-16 21:57:40 +00:00
/*
* BIRD -- I/O and event loop
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
Initial BFD commit, work in progress.
2013-09-10 10:09:36 +00:00
Converting the former BFD loop to a universal IO loop and protocol loop. There is a simple universal IO loop, taking care of events, timers and sockets. Primarily, one instance of a protocol should use exactly one IO loop to do all its work, as is now done in BFD. Contrary to previous versions, the loop is now launched and cleaned by the nest/proto.c code, allowing for a protocol to just request its own loop by setting the loop's lock order in config higher than the_bird. It is not supported nor checked if any protocol changed the requested lock order in reconfigure. No protocol should do it at all.
2021-06-19 18:50:18 +00:00
#ifndef _BIRD_SYSDEP_UNIX_IO_LOOP_H_
#define _BIRD_SYSDEP_UNIX_IO_LOOP_H_
Initial BFD commit, work in progress.
2013-09-10 10:09:36 +00:00
Page allocator moved from pools to IO loops. The resource pool system is highly hierarchical and keeping spare pages in pools leads to unnecessarily complex memory management. Loops have a flat hiearchy, at least for now, and it is therefore much easier to keep care of pages, especially in cases of excessive virtual memory fragmentation.
2021-11-30 22:57:14 +00:00
#include "nest/bird.h"
#include "lib/lists.h"
#include "lib/event.h"
#include "lib/timer.h"
struct free_pages
{
list list; /* List of empty pages */
event *cleanup; /* Event to call when number of pages is outside bounds */
u16 min, max; /* Minimal and maximal number of free pages kept */
uint cnt; /* Number of empty pages */
};
Converting the former BFD loop to a universal IO loop and protocol loop. There is a simple universal IO loop, taking care of events, timers and sockets. Primarily, one instance of a protocol should use exactly one IO loop to do all its work, as is now done in BFD. Contrary to previous versions, the loop is now launched and cleaned by the nest/proto.c code, allowing for a protocol to just request its own loop by setting the loop's lock order in config higher than the_bird. It is not supported nor checked if any protocol changed the requested lock order in reconfigure. No protocol should do it at all.
2021-06-19 18:50:18 +00:00
struct birdloop
{
For safer memory allocations, resources are bound to loops. Also all loops have their basic resource pool for allocations which are auto-freed when the loop is stopping.
2021-11-30 17:16:49 +00:00
resource r;
Converting the former BFD loop to a universal IO loop and protocol loop. There is a simple universal IO loop, taking care of events, timers and sockets. Primarily, one instance of a protocol should use exactly one IO loop to do all its work, as is now done in BFD. Contrary to previous versions, the loop is now launched and cleaned by the nest/proto.c code, allowing for a protocol to just request its own loop by setting the loop's lock order in config higher than the_bird. It is not supported nor checked if any protocol changed the requested lock order in reconfigure. No protocol should do it at all.
2021-06-19 18:50:18 +00:00
pool *pool;
For safer memory allocations, resources are bound to loops. Also all loops have their basic resource pool for allocations which are auto-freed when the loop is stopping.
2021-11-30 17:16:49 +00:00
pool *parent;
BFD work in progress. Now it compiles and mostly works.
2013-09-16 21:57:40 +00:00
Converting the former BFD loop to a universal IO loop and protocol loop. There is a simple universal IO loop, taking care of events, timers and sockets. Primarily, one instance of a protocol should use exactly one IO loop to do all its work, as is now done in BFD. Contrary to previous versions, the loop is now launched and cleaned by the nest/proto.c code, allowing for a protocol to just request its own loop by setting the loop's lock order in config higher than the_bird. It is not supported nor checked if any protocol changed the requested lock order in reconfigure. No protocol should do it at all.
2021-06-19 18:50:18 +00:00
struct timeloop time;
event_list event_list;
list sock_list;
uint sock_num;
BFD work in progress. Now it compiles and mostly works.
2013-09-16 21:57:40 +00:00
Converting the former BFD loop to a universal IO loop and protocol loop. There is a simple universal IO loop, taking care of events, timers and sockets. Primarily, one instance of a protocol should use exactly one IO loop to do all its work, as is now done in BFD. Contrary to previous versions, the loop is now launched and cleaned by the nest/proto.c code, allowing for a protocol to just request its own loop by setting the loop's lock order in config higher than the_bird. It is not supported nor checked if any protocol changed the requested lock order in reconfigure. No protocol should do it at all.
2021-06-19 18:50:18 +00:00
BUFFER(sock *) poll_sk;
BUFFER(struct pollfd) poll_fd;
u8 poll_changed;
u8 close_scheduled;
Initial BFD commit, work in progress.
2013-09-10 10:09:36 +00:00
Converting the former BFD loop to a universal IO loop and protocol loop. There is a simple universal IO loop, taking care of events, timers and sockets. Primarily, one instance of a protocol should use exactly one IO loop to do all its work, as is now done in BFD. Contrary to previous versions, the loop is now launched and cleaned by the nest/proto.c code, allowing for a protocol to just request its own loop by setting the loop's lock order in config higher than the_bird. It is not supported nor checked if any protocol changed the requested lock order in reconfigure. No protocol should do it at all.
2021-06-19 18:50:18 +00:00
_Atomic u32 ping_sent;
int wakeup_fds[2];
Initial BFD commit, work in progress.
2013-09-10 10:09:36 +00:00
Converting the former BFD loop to a universal IO loop and protocol loop. There is a simple universal IO loop, taking care of events, timers and sockets. Primarily, one instance of a protocol should use exactly one IO loop to do all its work, as is now done in BFD. Contrary to previous versions, the loop is now launched and cleaned by the nest/proto.c code, allowing for a protocol to just request its own loop by setting the loop's lock order in config higher than the_bird. It is not supported nor checked if any protocol changed the requested lock order in reconfigure. No protocol should do it at all.
2021-06-19 18:50:18 +00:00
uint links;
BFD protocol, ready for release. Supports OSPF and BGP and also statically configured sessions.
2013-11-19 21:33:48 +00:00
Page allocator moved from pools to IO loops. The resource pool system is highly hierarchical and keeping spare pages in pools leads to unnecessarily complex memory management. Loops have a flat hiearchy, at least for now, and it is therefore much easier to keep care of pages, especially in cases of excessive virtual memory fragmentation.
2021-11-30 22:57:14 +00:00
struct free_pages pages;
Converting the former BFD loop to a universal IO loop and protocol loop. There is a simple universal IO loop, taking care of events, timers and sockets. Primarily, one instance of a protocol should use exactly one IO loop to do all its work, as is now done in BFD. Contrary to previous versions, the loop is now launched and cleaned by the nest/proto.c code, allowing for a protocol to just request its own loop by setting the loop's lock order in config higher than the_bird. It is not supported nor checked if any protocol changed the requested lock order in reconfigure. No protocol should do it at all.
2021-06-19 18:50:18 +00:00
void (*stopped)(void *data);
void *stop_data;
BFD work in progress. Now it compiles and mostly works.
2013-09-16 21:57:40 +00:00
Converting the former BFD loop to a universal IO loop and protocol loop. There is a simple universal IO loop, taking care of events, timers and sockets. Primarily, one instance of a protocol should use exactly one IO loop to do all its work, as is now done in BFD. Contrary to previous versions, the loop is now launched and cleaned by the nest/proto.c code, allowing for a protocol to just request its own loop by setting the loop's lock order in config higher than the_bird. It is not supported nor checked if any protocol changed the requested lock order in reconfigure. No protocol should do it at all.
2021-06-19 18:50:18 +00:00
struct birdloop *prev_loop;
};
Initial BFD commit, work in progress.
2013-09-10 10:09:36 +00:00
Page allocator moved from pools to IO loops. The resource pool system is highly hierarchical and keeping spare pages in pools leads to unnecessarily complex memory management. Loops have a flat hiearchy, at least for now, and it is therefore much easier to keep care of pages, especially in cases of excessive virtual memory fragmentation.
2021-11-30 22:57:14 +00:00
extern _Thread_local struct birdloop *birdloop_current;
void init_pages(struct birdloop *loop);
void flush_pages(struct birdloop *loop);
Converting the former BFD loop to a universal IO loop and protocol loop. There is a simple universal IO loop, taking care of events, timers and sockets. Primarily, one instance of a protocol should use exactly one IO loop to do all its work, as is now done in BFD. Contrary to previous versions, the loop is now launched and cleaned by the nest/proto.c code, allowing for a protocol to just request its own loop by setting the loop's lock order in config higher than the_bird. It is not supported nor checked if any protocol changed the requested lock order in reconfigure. No protocol should do it at all.
2021-06-19 18:50:18 +00:00
#endif
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