/**
Perform the specified event. Since almost all event firings will
not be matched by even a single event handler, we make sure to
optimize the 'no matches' path. This means that nothing is
allocated/initialized unless needed.
*/
static void event_fire_internal(const event_t &event)
{
event_list_t fire;
/*
First we free all events that have been removed, but only if this
invocation of event_fire_internal is not a recursive call.
*/
if (is_event <= 1)
event_free_kills();
if (events.empty())
return;
/*
Then we iterate over all events, adding events that should be
fired to a second list. We need to do this in a separate step
since an event handler might call event_remove or
event_add_handler, which will change the contents of the \c
events list.
*/
for (size_t i=0; i<events.size(); i++)
{
event_t *criterion = events.at(i);
/*
Check if this event is a match
*/
if (event_match(*criterion, event))
{
fire.push_back(criterion);
}
}
/*
No matches. Time to return.
*/
if (fire.empty())
return;
if (signal_is_blocked())
{
/* Fix for https://github.com/fish-shell/fish-shell/issues/608. Don't run event handlers while signals are blocked. */
event_t *heap_event = new event_t(event);
input_common_add_callback(fire_event_callback, heap_event);
return;
}
/*
Iterate over our list of matching events
*/
for (size_t i=0; i<fire.size(); i++)
{
event_t *criterion = fire.at(i);
int prev_status;
/*
Check if this event has been removed, if so, dont fire it
*/
if (event_is_killed(*criterion))
continue;
/*
Fire event
*/
wcstring buffer = criterion->function_name;
for (size_t j=0; j < event.arguments.size(); j++)
{
wcstring arg_esc = escape_string(event.arguments.at(j), 1);
buffer += L" ";
buffer += arg_esc;
}
// debug( 1, L"Event handler fires command '%ls'", buffer.c_str() );
/*
Event handlers are not part of the main flow of code, so
they are marked as non-interactive
*/
proc_push_interactive(0);
prev_status = proc_get_last_status();
parser_t &parser = parser_t::principal_parser();
block_t *block = new event_block_t(event);
parser.push_block(block);
parser.eval(buffer, io_chain_t(), TOP);
parser.pop_block();
proc_pop_interactive();
proc_set_last_status(prev_status);
}
/*
Free killed events
*/
if (is_event <= 1)
event_free_kills();
}
/**
Perform the specified event. Since almost all event firings will
not be matched by even a single event handler, we make sure to
optimize the 'no matches' path. This means that nothing is
allocated/initialized unless needed.
*/
static void event_fire_internal(const event_t *event)
{
size_t i, j;
event_list_t fire;
/*
First we free all events that have been removed
*/
event_free_kills();
if (events.empty())
return;
/*
Then we iterate over all events, adding events that should be
fired to a second list. We need to do this in a separate step
since an event handler might call event_remove or
event_add_handler, which will change the contents of the \c
events list.
*/
for (i=0; i<events.size(); i++)
{
event_t *criterion = events.at(i);
/*
Check if this event is a match
*/
if (event_match(criterion, event))
{
fire.push_back(criterion);
}
}
/*
No matches. Time to return.
*/
if (fire.empty())
return;
/*
Iterate over our list of matching events
*/
for (i=0; i<fire.size(); i++)
{
event_t *criterion = fire.at(i);
int prev_status;
/*
Check if this event has been removed, if so, dont fire it
*/
if (event_is_killed(criterion))
continue;
/*
Fire event
*/
wcstring buffer = criterion->function_name;
if (event->arguments.get())
{
for (j=0; j< event->arguments->size(); j++)
{
wcstring arg_esc = escape_string(event->arguments->at(j), 1);
buffer += L" ";
buffer += arg_esc;
}
}
// debug( 1, L"Event handler fires command '%ls'", buffer.c_str() );
/*
Event handlers are not part of the main flow of code, so
they are marked as non-interactive
*/
proc_push_interactive(0);
prev_status = proc_get_last_status();
parser_t &parser = parser_t::principal_parser();
block_t *block = new event_block_t(event);
parser.push_block(block);
parser.eval(buffer, io_chain_t(), TOP);
parser.pop_block();
proc_pop_interactive();
proc_set_last_status(prev_status);
}
/*
Free killed events
*/
event_free_kills();
}
