lib: ioloop: Add functions for adding/moving timeouts and ios to a specific ioloop.

lib: ioloop.h - improve ioloop context comments

lib: Move io_loop_context_[de]activate() to be public

lib: Add missing parenthesis to timeout_add()'s msecs parameter checks This caused wrong results when the msecs parameter contained e.g. var?1:2

lib: Added io_wait_timer This allows easier tracking of how much time the io_wait_timer has been spending on (multiple) ioloops.

lib: Added ioloop_global_wait_usecs This is helpful when multiple ioloops aren't used and io_loop_get_wait_usecs() can't be easily used for all of them.

io: Add source filename This will make debugging alot easier when you can see what the filename is as well.

lib: Added io_loop_find_fd_conditions()

lib: Added io_loop_get_wait_usecs()

lib: Added io_loop_extract_notify_fd()

lib: io_add_notify() wasn't setting struct io.source_linenum

lib: Added support for setting timeouts at absolute time, rather than relative to current time.

lib: Code cleanup - check io_loop_context_add/remove_callbacks() callback parameters.

Added io_add_istream() and related functionality for combining the ioloop/istream. The idea here is that it's possible to implement asynchronous istreams when there isn't a file descriptor that can be used to reliably receive updates.

ioloop: Added io_set_pending()

Added io_loop_add/remove_switch_callback() to call a callback when ioloop is changed.

Added io_loop_have_immediate_timeouts()

Added io_loop_have_ios()

Removed CONTEXT_TYPE_SAFETY macro and reimplemented its functionality better. gcc/clang now gives a compiler error in many places if callback isn't exactly what was expected. It's also now much easier to add more of these checks.

Marked functions parameters that are allowed to be NULL. Some APIs were also changed. The non-obvious APIs where NULL parameter was changed to "" are master_service_init() and auth_master_user_list_init(). These checks can currently be enabled only on a patched clang: http://llvm.org/bugs/show_bug.cgi?id=6786

Use timeout_add_short() for sub-second timeouts. Fail at compile time if timeout_add() is <1s. In future timeout_add() could perhaps also be made less precise, so that it would try to group timeouts to run around at the same time.

ioloop: I/O and timeout leak messages now include the io_add()/timeout_add() source line number. This helps figuring out the leak especially when using ASLR. Also in 64bit systems there's no increased memory usage, because the line number replaces only padding.

liblib: Added io_loop_time_refresh()

liblib: Added io_loop_get_current_context()

liblib: io_loop_context_remove_callbacks() now requires also callbacks.

Replaced "ioloop log" with a more generic "ioloop context". The context can call multiple callbacks that can do anything they want, including setting the log prefix.

Added io_loop_move_io() and io_loop_move_timeout().

ioloop: Added support for per-io/timeout callback log prefix automation.

ioloop: Added callback for handling time jumping forwards/backwards. The default implementation is now to only log a warning when time moves backwards. The callback is also called if it's detected that time jumps forwards. In both cases existing timeouts' run times are updated so that they're called approximately the intended time. --HG-- branch : HEAD

Removed ioloop_timezone. It's not working nowadays. --HG-- branch : HEAD

Added io_loop_set_max_fd_count() to specify how many fds we expect to use. It's used currently only for figuring out how much space should be allocated initially to fds. --HG-- branch : HEAD

Don't break if io_remove() or timeout_remove() are called for non-active ioloops. --HG-- branch : HEAD

Added io_remove_closed(). --HG-- branch : HEAD

Renamed IO_NOTIFY_DISABLED to IO_NOTIFY_NOSUPPORT. IO_NOTIFY_NOSUPPORT is now also given by dnotify when trying to listen for files. Fixes busy looping with dnotify when waiting for dotlock to get deleted. --HG-- branch : HEAD

Use priority queue to implement timeout handling. Added timeout_reset(). --HG-- branch : HEAD

Changed .h ifdef/defines to use <NAME>_H format. --HG-- branch : HEAD

Changed io_add_notify() API so that it can return "file doesn't exist" error. --HG-- branch : HEAD

Various cleanups to ioloop code. --HG-- branch : HEAD

Added context parameter type safety checks for most callback APIs. --HG-- branch : HEAD

OK, so the original kqueue code wasn't actually broken, but it could have been made much simpler. Updated comments in ioloop.h about IO_READ and IO_ERROR usage. --HG-- branch : HEAD

IO_ERROR and IO_NOTIFY had conflicting values. --HG-- branch : HEAD

Removed extra comma at end of enum list --HG-- branch : HEAD

deinit, unref, destroy, close, free, etc. functions now take a pointer to their data pointer, and set it to NULL. This makes double-frees less likely to cause security holes. --HG-- branch : HEAD

Added "bool" type and changed all ints that were used as booleans to bool. --HG-- branch : HEAD

Export current_ioloop globally. --HG-- branch : HEAD

Added IO_ERROR condition that we can watch now. --HG-- branch : HEAD

New inotify code and notify API change. Patch by Johannes Berg --HG-- branch : HEAD

Added IO_DIR_NOTIFY and IO_FILE_NOTIFY conditions to io_add(). IO_DIR_NOTIFY is now implemented for Linux dnotify. --HG-- branch : HEAD

Removed I/O priorities. They were pretty much useless and were just getting in way. --HG-- branch : HEAD

struct timeval requires sys/time.h --HG-- branch : HEAD

Removed useless parameters from io_callback_t and timeout_callback_t. --HG-- branch : HEAD

Added io_loop_is_running() --HG-- branch : HEAD

Naming change for function typedefs. --HG-- branch : HEAD

Naming style changes, finally got tired of most of the typedefs. Also the previous enum -> macro change reverted so that we don't use the highest bit anymore, that's incompatible with old indexes so they will be rebuilt. --HG-- branch : HEAD

Fixes to timezone handling which were handling quite badly. added ioloop_timezone which gets updated with ioloop_time. Changed some GMT references to UTC. Timezone offsets are in minutes now everywhere instead of seconds. Fixes for unsigned time_t. --HG-- branch : HEAD

ioloop_create() takes now pool-parameter. io_buffer_create_mmaped() takes start_offset parameter instead of getting it with lseek(). Instead of using offsets to index file, we now use record indexes (first_hole_index, tree file). --HG-- branch : HEAD

s/user_data/context/ and some s/Data/Context/ --HG-- branch : HEAD

Initial revision --HG-- branch : HEAD