154 lines
4.0 KiB
C
154 lines
4.0 KiB
C
/*
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* Copyright © 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef VULKAN_WSI_COMMON_QUEUE_H
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#define VULKAN_WSI_COMMON_QUEUE_H
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#include <time.h>
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#include <pthread.h>
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#include "util/u_vector.h"
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struct wsi_queue {
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struct u_vector vector;
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pthread_mutex_t mutex;
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pthread_cond_t cond;
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};
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static inline int
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wsi_queue_init(struct wsi_queue *queue, int length)
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{
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int ret;
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if (length < 4)
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length = 4;
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ret = u_vector_init(&queue->vector, length, sizeof(uint32_t));
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if (!ret)
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return ENOMEM;
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pthread_condattr_t condattr;
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ret = pthread_condattr_init(&condattr);
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if (ret)
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goto fail_vector;
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ret = pthread_condattr_setclock(&condattr, CLOCK_MONOTONIC);
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if (ret)
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goto fail_condattr;
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ret = pthread_cond_init(&queue->cond, &condattr);
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if (ret)
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goto fail_condattr;
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ret = pthread_mutex_init(&queue->mutex, NULL);
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if (ret)
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goto fail_cond;
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pthread_condattr_destroy(&condattr);
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return 0;
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fail_cond:
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pthread_cond_destroy(&queue->cond);
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fail_condattr:
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pthread_condattr_destroy(&condattr);
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fail_vector:
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u_vector_finish(&queue->vector);
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return ret;
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}
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static inline void
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wsi_queue_destroy(struct wsi_queue *queue)
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{
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u_vector_finish(&queue->vector);
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pthread_mutex_destroy(&queue->mutex);
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pthread_cond_destroy(&queue->cond);
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}
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static inline void
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wsi_queue_push(struct wsi_queue *queue, uint32_t index)
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{
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uint32_t *elem;
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pthread_mutex_lock(&queue->mutex);
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if (u_vector_length(&queue->vector) == 0)
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pthread_cond_signal(&queue->cond);
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elem = u_vector_add(&queue->vector);
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*elem = index;
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pthread_mutex_unlock(&queue->mutex);
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}
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#define NSEC_PER_SEC 1000000000
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#define INT_TYPE_MAX(type) ((1ull << (sizeof(type) * 8 - 1)) - 1)
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static inline VkResult
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wsi_queue_pull(struct wsi_queue *queue, uint32_t *index, uint64_t timeout)
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{
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VkResult result;
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int32_t ret;
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pthread_mutex_lock(&queue->mutex);
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struct timespec now;
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clock_gettime(CLOCK_MONOTONIC, &now);
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uint32_t abs_nsec = now.tv_nsec + timeout % NSEC_PER_SEC;
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uint64_t abs_sec = now.tv_sec + (abs_nsec / NSEC_PER_SEC) +
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(timeout / NSEC_PER_SEC);
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abs_nsec %= NSEC_PER_SEC;
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/* Avoid roll-over in tv_sec on 32-bit systems if the user provided timeout
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* is UINT64_MAX
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*/
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struct timespec abstime;
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abstime.tv_nsec = abs_nsec;
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abstime.tv_sec = MIN2(abs_sec, INT_TYPE_MAX(abstime.tv_sec));
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while (u_vector_length(&queue->vector) == 0) {
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ret = pthread_cond_timedwait(&queue->cond, &queue->mutex, &abstime);
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if (ret == 0) {
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continue;
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} else if (ret == ETIMEDOUT) {
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result = VK_TIMEOUT;
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goto end;
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} else {
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/* Something went badly wrong */
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result = VK_ERROR_OUT_OF_DATE_KHR;
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goto end;
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}
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}
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uint32_t *elem = u_vector_remove(&queue->vector);
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*index = *elem;
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result = VK_SUCCESS;
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end:
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pthread_mutex_unlock(&queue->mutex);
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return result;
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}
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#endif /* VULKAN_WSI_COMMON_QUEUE_H */
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