Essentially the problem is this: For drag and drop Ecore currently handles the
position update calls. But usually the application wants to display some user
feedback - a window to display the drag selection for instance.
Now the way e17 does it is grab the mouse cursor movements and track them
itself. However ecore is already doing this, it's already walking window
trees, calculating real positions, _and_ sending them in an X client message.
So it seems rather silly to duplicate the code in the user app to get the same
info.
We could possibly have added a new event, but then we need to deal the fact
the position update may arrive _After_ the item has been dropped. Hilarity
ensures[1].
This callback is meant for purely the selection owner of the drag to use, so
it is a callback set, not an add.
[1] Segfaults probably. Nothing funnier.
SVN revision: 52181
Lowering priority was wrong. Some bugs:
1) You don't lower the priority by setting the scheduler policy to some
of the real-time ones (SCHED_RR or SCHER_FIFO). If you do so, you are
actually increasing the priority of the workers and your main thread
you be preempted and stalled until the workers complete their job.
Fortunately this will only happen if your programming is running as
root, as normal users (without CAP_SYS_NICE) are unable to set
priority to real-time values.
2) setpriority() and getpriority() are not part of pthread and you can't
use the id returned by pthread. Manpage explicitly says so on
pthread_self(3):
"The thread ID returned by pthread_self() is not the same thing as the
kernel thread ID returned by a call to gettid(2)."
Since glibc does not have a gettid, here we are using
syscall(SYS_gettid)
This patch was tested with the program below. Compile and run:
$ gcc p_hello2.c -o p_hello2 -lpthread
$ ./p_hello2 10
You'll see that the main thread remains with its priority and threads
created by the main thread change their own niceness.
#include <errno.h>
#include <pthread.h>
#include <sched.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/resource.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
/* Lower priority of current thread.
*
* It's used by worker threads so they use up "bg cpu" as it was really intended
* to work. If current thread is running with real-time priority, we decrease
* our priority by 5. This is done in a portable way. Otherwise we are
* running with SCHED_OTHER policy and there's no portable way to set the nice
* level on current thread. In Linux, it does work and it's the only one that is
* implemented.
*/
static void
_ecore_thread_pri_drop(void)
{
struct sched_param param;
int pol, prio, ret;
pid_t tid;
pthread_t pthread_id;
pthread_id = pthread_self();
ret = pthread_getschedparam(pthread_id, &pol, ¶m);
if (ret)
{
fprintf(stderr, "Unable to query sched parameters\n");
return;
}
if (pol == SCHED_RR || pol == SCHED_FIFO)
{
prio = sched_get_priority_max(pol);
param.sched_priority += 5;
if (prio > 0 && param.sched_priority > prio)
param.sched_priority = prio;
pthread_setschedparam(pthread_id, pol, ¶m);
}
#ifdef __linux__
else
{
tid = syscall(SYS_gettid);
errno = 0;
prio = getpriority(PRIO_PROCESS, tid);
if (errno == 0)
{
prio += 5;
if (prio > 19)
prio = 19;
setpriority(PRIO_PROCESS, tid, prio);
}
}
#endif
}
/*
* p_hello.c -- a hello program (in pthread)
*/
#define MAX_THREAD 1000
typedef struct {
int id;
} parm;
void *hello(void *arg)
{
parm *p=(parm *)arg;
pid_t tid;
int prio;
tid = syscall(SYS_gettid);
printf("[%d] Hello from node %d\n", tid, p->id);
pthread_yield();
printf("[%d] tid=%lu\n", tid);
_ecore_thread_pri_drop();
prio = getpriority(PRIO_PROCESS, tid);
printf("[%d] New nice value: %d\n", tid, prio);
return (NULL);
}
void main(int argc, char* argv[]) {
int n,i;
pthread_t *threads;
pthread_attr_t pthread_custom_attr;
parm *p;
pid_t tid;
int prio;
if (argc != 2)
{
printf ("Usage: %s n\n where n is no. of threads\n",argv[0]);
exit(1);
}
n=atoi(argv[1]);
if ((n < 1) || (n > MAX_THREAD)) {
printf ("The no of thread should between 1 and %d.\n",MAX_THREAD);
exit(1);
}
threads = (pthread_t *)malloc(n * sizeof(*threads));
pthread_attr_init(&pthread_custom_attr);
p = (parm *)malloc(n * sizeof(parm));
/* Start up thread */
tid = syscall(SYS_gettid);
for (i=0; i<n; i++) {
prio = getpriority(PRIO_PROCESS, tid);
printf("[%d] root thread nice value: %d\n", tid, prio);
p[i].id=i;
pthread_create(&threads[i], &pthread_custom_attr, hello, (void *)(p+i));
}
/* Synchronize the completion of each thread. */
for (i=0; i<n; i++) {
pthread_join(threads[i],NULL);
}
free(p);
}
SVN revision: 52039
The offending projects were:
E16/e/src/backgrounds.c | 10 ++++------
PROTO/eon/src/lib/layout/eon_stack.c | 4 +---
ecore/src/lib/ecore_win32/ecore_win32.c | 3 +--
ecore/src/lib/ecore_wince/ecore_wince.c | 3 +--
edje/src/lib/edje_edit.c | 3 +--
evas/src/lib/cache/evas_cache_image.c | 2 +-
exalt/src/lib/libexalt_private.c | 2 +-
This patch assumes code in these places were insane and the fix is to remove
one condition check. Most likely this is not true, but there's no automatic fix
for that.
Looking at the patch, it seems that some places should use "x" and "y" vars but
used just one of them and therefore they were caught by coccinelle.
SVN revision: 51666
Revert previous patch generated by badnull.cocci script, and apply the new one.
The main difference is that assert and assert-like functions are not touched
anymore.
SVN revision: 51650
Apply badzero.cocci, badnull.coci and badnull2.cocci
This should convert all cases where there's a comparison to NULL to simpler
forms. This patch applies the following transformations:
code before patch ||code after patch
===============================================================
return a == NULL; return !a;
return a != NULL; return !!a;
func(a == NULL); func(!a);
func(a != NULL); func(!!a);
b = a == NULL; b = !a;
b = a != NULL; b = !!a;
b = a == NULL ? c : d; b = !a ? c : d;
b = a != NULL ? c : d; b = a ? c : d;
other cases:
a == NULL !a
a != NULL a
SVN revision: 51487
Brett Nash
Carsten Haitzler
Lucas De Marchi
Cedric BAIL
Christopher Michael
Vincent Torri
Mike Blumenkrantz
Nicholas Hughart
Sebastian Dransfeld