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ecore - mainloop - select - increase max set size and check fd if over 

if fd's exceed max set size then things will ... god bad. how - ...
depends on the OS but at least report that there is an issue.
This commit is contained in:
Carsten Haitzler 2021-06-04 12:12:12 +01:00
parent ac1460dab3
commit 4f5b1b2fad
3 changed files with 42 additions and 0 deletions
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2
meson.build
View File

@ -637,6 +637,8 @@ efl_config_h.set('EFL_BUILD_ID', get_option('build-id'))
# FIXME placeholder
efl_config_h.set('EFL_API_LEGACY_DEF', '#define EFL_API_LEGACY_DEF "FIXME NOT IMPLEMENTED"')
config_h.set('EFL_MAX_FD_SIZE', get_option('max-fd-size'))
configure_file(
output: 'config.h',
configuration: config_h

6
meson_options.txt
View File

@ -376,3 +376,9 @@ option('efl-one',
value : false,
description : 'Build special set of .so´s as a single .so'
)
option('max-fd-size',
type : 'string',
value : '8192',
description : 'This is the maximim set of fds and thus maximum fd value allowed +1 in the ecore main loop handler'
)

34
src/lib/ecore/ecore_main.c
View File

@ -4,6 +4,19 @@
#define EINA_SLSTR_INTERNAL
// as per:
//
// https://forums.freebsd.org/threads/solved-enlightenment-application-menu-icons-missing-due-to-efreetd-crashing.80743/
//
// from ethorns - can't find more user info...
//
// normal fd set size (maximum fd num allowed) is limited to 1024. raise this
// to something more useful than the default 1024 ... this doesn't affect
// linux as it will use epoll. beware that this also will be a performance
// hit - the higher this number the more it costs to zero and re-fill the fd
// set every time we go into select.
#define FD_SETSIZE EFL_MAX_FD_SIZE
#ifdef _WIN32
# ifndef USER_TIMER_MINIMUM
# define USER_TIMER_MINIMUM 0x0a
@ -1768,6 +1781,25 @@ _ecore_main_prepare_handlers(Eo *obj EINA_UNUSED, Efl_Loop_Data *pd)
}
}
static void
_ecore_main_select_fd_too_big_check(int fd)
{
if (fd < FD_SETSIZE) return;
int newsize = fd + 1 - 1;
newsize |= newsize >> 1;
newsize |= newsize >> 2;
newsize |= newsize >> 4;
newsize |= newsize >> 8;
newsize |= newsize >> 16;
newsize++;
fprintf(stderr,
"ERROR: ecore main loop, fd %i >= max possible fd %i. "
"If this continues to be an issue with lots of high value fds "
"being needed, perhaps consider recompiling EFL with the option: "
"-Dmax-fd-size=%i\n"
, fd, FD_SETSIZE, newsize);
}
#if !defined(USE_G_MAIN_LOOP)
static int
_ecore_main_select(Eo *obj, Efl_Loop_Data *pd, double timeout)
@ -1820,6 +1852,7 @@ _ecore_main_select(Eo *obj, Efl_Loop_Data *pd, double timeout)
{
if (!fdh->delete_me)
{
_ecore_main_select_fd_too_big_check(fdh->fd);
if ((fdh->flags & ECORE_FD_READ) || (fdh->flags & ECORE_FD_ALWAYS))
{
FD_SET(fdh->fd, &rfds);
@ -1851,6 +1884,7 @@ _ecore_main_select(Eo *obj, Efl_Loop_Data *pd, double timeout)
{
if (!fdh->delete_me)
{
_ecore_main_select_fd_too_big_check(fdh->fd);
if ((fdh->flags & ECORE_FD_READ) || (fdh->flags & ECORE_FD_ALWAYS))
{
FD_SET(fdh->fd, &rfds);