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ui-status-indeterminate.c
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ui-status-indeterminate.c
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/*
* Copyright (C) 2023 NVIDIA Corporation
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses>.
*/
#include <stdlib.h>
#include <pthread.h>
#include "ui-status-indeterminate.h"
struct __indeterminate_data {
pthread_mutex_t mutex;
pthread_t thread;
IndeterminateState state;
};
/* Allocate an IndeterminateData and initialize its mutex */
IndeterminateData *indeterminate_init(void)
{
IndeterminateData *ret = calloc(1, sizeof(*ret));
if (ret) {
if (pthread_mutex_init(&ret->mutex, NULL) == 0) {
ret->state = INDETERMINATE_INACTIVE;
} else {
ret->state = INDETERMINATE_INVALID;
}
}
return ret;
}
/* Clean up IndeterminateData resources */
void indeterminate_destroy(IndeterminateData *d)
{
if (d) {
if (d->state != INDETERMINATE_INVALID) {
pthread_mutex_destroy(&d->mutex);
}
free(d);
}
}
/* Get the current state of the indeterminate progress bar */
IndeterminateState indeterminate_get(IndeterminateData *d)
{
IndeterminateState state = INDETERMINATE_INVALID;
if (d && d->state != INDETERMINATE_INVALID) {
if (!pthread_mutex_lock(&d->mutex)) {
state = d->state;
if (pthread_mutex_unlock(&d->mutex)) {
state = INDETERMINATE_INVALID;
}
}
}
return state;
}
static void indeterminate_set(IndeterminateData *d, IndeterminateState state)
{
if (!d || d->state == INDETERMINATE_INVALID) {
return;
} else if (pthread_mutex_lock(&d->mutex)) {
d->state = INDETERMINATE_INVALID;
return;
}
d->state = state;
if (pthread_mutex_unlock(&d->mutex)) {
d->state = INDETERMINATE_INVALID;
}
}
/* Begin displaying a new indeterminate indicator, replacing any existing bar */
void indeterminate_begin(IndeterminateData *d, void *(*worker)(void *),
void *args)
{
if (!d || indeterminate_get(d) == INDETERMINATE_INVALID) {
return;
}
/* Finish any existing indeterminate progress indicator */
indeterminate_end(d);
if (pthread_create(&d->thread, NULL, worker, args)) {
indeterminate_set(d, INDETERMINATE_INVALID);
} else {
indeterminate_set(d, INDETERMINATE_ACTIVE);
}
}
/* Stop the indeterminate progress bar and wait for it to finish updating */
void indeterminate_end(IndeterminateData *d)
{
void *join_ret;
if (!d || indeterminate_get(d) != INDETERMINATE_ACTIVE) {
return;
}
indeterminate_set(d, INDETERMINATE_INACTIVE);
if (pthread_join(d->thread, &join_ret)) {
indeterminate_set(d, INDETERMINATE_INVALID);
}
}