diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/vulkan/wsi/Makefile.sources | 3 | ||||
| -rw-r--r-- | src/vulkan/wsi/wsi_common_queue.h | 154 |
2 files changed, 156 insertions, 1 deletions
diff --git a/src/vulkan/wsi/Makefile.sources b/src/vulkan/wsi/Makefile.sources index 3139e6dbb7e..50660f9a541 100644 --- a/src/vulkan/wsi/Makefile.sources +++ b/src/vulkan/wsi/Makefile.sources @@ -1,6 +1,7 @@ VULKAN_WSI_FILES := \ - wsi_common.h + wsi_common.h \ + wsi_common_queue.h VULKAN_WSI_WAYLAND_FILES := \ wsi_common_wayland.c \ diff --git a/src/vulkan/wsi/wsi_common_queue.h b/src/vulkan/wsi/wsi_common_queue.h new file mode 100644 index 00000000000..0e72c8d2cc6 --- /dev/null +++ b/src/vulkan/wsi/wsi_common_queue.h @@ -0,0 +1,154 @@ +/* + * Copyright © 2016 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef VULKAN_WSI_COMMON_QUEUE_H +#define VULKAN_WSI_COMMON_QUEUE_H + +#include <time.h> +#include <pthread.h> +#include "util/u_vector.h" + +struct wsi_queue { + struct u_vector vector; + pthread_mutex_t mutex; + pthread_cond_t cond; +}; + +static inline int +wsi_queue_init(struct wsi_queue *queue, int length) +{ + int ret; + + uint32_t length_pow2 = 4; + while (length_pow2 < length) + length_pow2 *= 2; + + ret = u_vector_init(&queue->vector, sizeof(uint32_t), + sizeof(uint32_t) * length_pow2); + if (!ret) + return ENOMEM; + + pthread_condattr_t condattr; + ret = pthread_condattr_init(&condattr); + if (ret) + goto fail_vector; + + ret = pthread_condattr_setclock(&condattr, CLOCK_MONOTONIC); + if (ret) + goto fail_condattr; + + ret = pthread_cond_init(&queue->cond, &condattr); + if (ret) + goto fail_condattr; + + ret = pthread_mutex_init(&queue->mutex, NULL); + if (ret) + goto fail_cond; + + return 0; + +fail_cond: + pthread_cond_destroy(&queue->cond); +fail_condattr: + pthread_condattr_destroy(&condattr); +fail_vector: + u_vector_finish(&queue->vector); + + return ret; +} + +static inline void +wsi_queue_destroy(struct wsi_queue *queue) +{ + u_vector_finish(&queue->vector); + pthread_mutex_destroy(&queue->mutex); + pthread_cond_destroy(&queue->cond); +} + +static inline void +wsi_queue_push(struct wsi_queue *queue, uint32_t index) +{ + uint32_t *elem; + + pthread_mutex_lock(&queue->mutex); + + if (u_vector_length(&queue->vector) == 0) + pthread_cond_signal(&queue->cond); + + elem = u_vector_add(&queue->vector); + *elem = index; + + pthread_mutex_unlock(&queue->mutex); +} + +#define NSEC_PER_SEC 1000000000 +#define INT_TYPE_MAX(type) ((1ull << (sizeof(type) * 8 - 1)) - 1) + +static inline VkResult +wsi_queue_pull(struct wsi_queue *queue, uint32_t *index, uint64_t timeout) +{ + VkResult result; + int32_t ret; + + pthread_mutex_lock(&queue->mutex); + + struct timespec now; + clock_gettime(CLOCK_MONOTONIC, &now); + + uint32_t abs_nsec = now.tv_nsec + timeout % NSEC_PER_SEC; + uint64_t abs_sec = now.tv_sec + (abs_nsec / NSEC_PER_SEC) + + (timeout / NSEC_PER_SEC); + abs_nsec %= NSEC_PER_SEC; + + /* Avoid roll-over in tv_sec on 32-bit systems if the user provided timeout + * is UINT64_MAX + */ + struct timespec abstime; + abstime.tv_nsec = abs_nsec; + abstime.tv_sec = MIN2(abs_sec, INT_TYPE_MAX(abstime.tv_sec)); + + while (u_vector_length(&queue->vector) == 0) { + ret = pthread_cond_timedwait(&queue->cond, &queue->mutex, &abstime); + if (ret == 0) { + continue; + } else if (ret == ETIMEDOUT) { + result = VK_TIMEOUT; + goto end; + } else { + /* Something went badly wrong */ + result = VK_ERROR_OUT_OF_DATE_KHR; + goto end; + } + } + + uint32_t *elem = u_vector_remove(&queue->vector); + *index = *elem; + result = VK_SUCCESS; + +end: + pthread_mutex_unlock(&queue->mutex); + + return result; +} + +#endif /* VULKAN_WSI_COMMON_QUEUE_H */ |