230 lines
7.7 KiB
C
230 lines
7.7 KiB
C
#include "multiprocessing.h"
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#include "array_list.h"
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#include "chunk.h"
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#include "config.h"
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#include "data.h"
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#include "file.h"
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#include "file_receive.h"
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#include "log.h"
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#include "protocol.h"
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#include "queue.h"
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#include "utils.h"
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <threads.h>
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PipelineContextSender* pipeline_context_sender_create(Config* config, Queue* queue_scanner,
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Queue* queue_loader) {
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PipelineContextSender* context = malloc(sizeof(PipelineContextSender));
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if (context == NULL)
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return NULL;
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context->config = config;
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context->queue_scanner = queue_scanner;
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context->queue_loader = queue_loader;
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context->scanner_done = false;
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context->loader_done = false;
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context->queued_bytes = 0;
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context->max_queue_bytes = 0;
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context->manifest = NULL;
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context->excluded_paths = NULL;
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context->size_skipped_paths = NULL;
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context->synced_dirs = NULL;
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context->plan_dirs = NULL;
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context->missing_args = NULL;
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context->scan_had_io_error = false;
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context->remove_source_files = NULL;
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context->early_delete = false;
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context->prescan_chunks = NULL;
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context->delete_plans = NULL;
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context->delete_suppressed = false;
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context->scan_stopped_early = false;
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context->total_files = 0;
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context->progress_bytes = 0;
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context->total_bytes = 0;
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memset(&context->stats, 0, sizeof(context->stats));
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context->sender_done = false;
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atomic_init(&context->cancelled, false);
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protocol_session_init(&context->allocation_session, -1, -1);
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protocol_session_set_max_alloc(&context->allocation_session, config->max_alloc);
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context->dir_entries = NULL;
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context->dir_entries_mutex_init = false;
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atomic_init(&context->dir_count, 0);
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context->delete_limit = false;
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context->partial = false;
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int init = 0;
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if (config->use_metadata) {
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context->dir_entries = array_list_create(file_destroy);
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if (!context->dir_entries)
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goto fail;
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}
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if (mtx_init(&context->mutex_scanner, mtx_plain) != thrd_success)
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goto fail;
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init++;
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if (cnd_init(&context->condition_not_full_scanner) != thrd_success)
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goto fail;
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init++;
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if (cnd_init(&context->condition_not_empty_scanner) != thrd_success)
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goto fail;
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init++;
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if (mtx_init(&context->mutex_loader, mtx_plain) != thrd_success)
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goto fail;
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init++;
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if (cnd_init(&context->condition_not_full_loader) != thrd_success)
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goto fail;
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init++;
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if (cnd_init(&context->condition_not_empty_loader) != thrd_success)
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goto fail;
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init++;
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if (mtx_init(&context->mutex_progress, mtx_plain) != thrd_success)
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goto fail;
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// cppcheck-suppress unreadVariable
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init++;
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if (mtx_init(&context->dir_entries_mutex, mtx_plain) != thrd_success)
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goto fail;
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context->dir_entries_mutex_init = true;
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return context;
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fail:
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log_message(LOG_LEVEL_ERROR, "%s", "Error initializing synchronization objects");
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if (context->dir_entries_mutex_init)
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mtx_destroy(&context->dir_entries_mutex);
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if (context->dir_entries)
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array_list_delete(context->dir_entries);
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if (init >= 7)
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mtx_destroy(&context->mutex_progress);
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if (init >= 6)
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cnd_destroy(&context->condition_not_empty_loader);
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if (init >= 5)
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cnd_destroy(&context->condition_not_full_loader);
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if (init >= 4)
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mtx_destroy(&context->mutex_loader);
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if (init >= 3)
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cnd_destroy(&context->condition_not_empty_scanner);
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if (init >= 2)
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cnd_destroy(&context->condition_not_full_scanner);
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if (init >= 1)
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mtx_destroy(&context->mutex_scanner);
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free(context);
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return NULL;
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}
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void pipeline_context_sender_set_queue_byte_limit(PipelineContextSender* context,
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size_t max_bytes) {
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if (context == NULL)
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return;
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mtx_lock(&context->mutex_loader);
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context->max_queue_bytes = max_bytes;
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context->queued_bytes = 0;
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cnd_broadcast(&context->condition_not_full_loader);
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mtx_unlock(&context->mutex_loader);
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}
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size_t pipeline_context_sender_chunk_bytes(const Chunk* chunk) {
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if (chunk == NULL || chunk->items == NULL)
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return 0;
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size_t total = 0;
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for (int i = 0; i < chunk->element_count; i++) {
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const File* file = chunk->items[i];
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if (file == NULL || file->data == NULL || file->data->data == NULL)
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continue;
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if (file->data->size > SIZE_MAX - total)
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return SIZE_MAX;
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total += file->data->size;
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}
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return total;
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}
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void pipeline_context_sender_note_bytes_released(PipelineContextSender* context,
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size_t released_bytes) {
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if (context == NULL || context->max_queue_bytes == 0 || released_bytes == 0)
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return;
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mtx_lock(&context->mutex_loader);
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if (released_bytes >= context->queued_bytes)
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context->queued_bytes = 0;
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else
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context->queued_bytes -= released_bytes;
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cnd_signal(&context->condition_not_full_loader);
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mtx_unlock(&context->mutex_loader);
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}
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bool pipeline_context_sender_enqueue_chunk(PipelineContextSender* context, Chunk* chunk) {
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if (context == NULL || chunk == NULL)
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return false;
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size_t chunk_bytes = pipeline_context_sender_chunk_bytes(chunk);
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mtx_lock(&context->mutex_loader);
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while (!atomic_load(&context->cancelled)) {
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bool blocked_by_count = queue_is_full(context->queue_loader);
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bool blocked_by_budget = false;
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if (context->max_queue_bytes > 0) {
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size_t budget = context->max_queue_bytes;
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size_t used = context->queued_bytes;
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if (used >= budget) {
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blocked_by_budget = true;
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} else if (chunk_bytes > budget - used) {
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/* A single payload larger than the whole budget is only admitted to an
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empty pipeline so the wait can never deadlock. */
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blocked_by_budget = used != 0;
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}
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}
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if (!blocked_by_count && !blocked_by_budget)
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break;
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cnd_wait(&context->condition_not_full_loader, &context->mutex_loader);
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}
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if (atomic_load(&context->cancelled)) {
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mtx_unlock(&context->mutex_loader);
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chunk_destroy(chunk);
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return false;
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}
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if (!queue_enqueue(context->queue_loader, chunk)) {
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mtx_unlock(&context->mutex_loader);
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chunk_destroy(chunk);
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return false;
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}
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context->queued_bytes += chunk_bytes;
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cnd_signal(&context->condition_not_empty_loader);
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mtx_unlock(&context->mutex_loader);
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return true;
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}
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void pipeline_context_sender_destroy(PipelineContextSender* context) {
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/* `config` is borrowed: the caller retains ownership and frees it after the
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pipeline has been destroyed (the worker threads are already joined, so no
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config access can outlive this call). */
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if (context->manifest) {
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array_list_delete(context->manifest);
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}
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if (context->prescan_chunks)
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array_list_delete(context->prescan_chunks);
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if (context->delete_plans)
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delete_plan_sender_destroy(context->delete_plans);
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if (context->excluded_paths)
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array_list_delete(context->excluded_paths);
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if (context->size_skipped_paths)
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array_list_delete(context->size_skipped_paths);
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if (context->synced_dirs)
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array_list_delete(context->synced_dirs);
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if (context->plan_dirs)
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array_list_delete(context->plan_dirs);
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if (context->missing_args)
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array_list_delete(context->missing_args);
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if (context->remove_source_files)
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array_list_delete(context->remove_source_files);
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if (context->dir_entries)
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array_list_delete(context->dir_entries);
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if (context->dir_entries_mutex_init)
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mtx_destroy(&context->dir_entries_mutex);
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queue_destroy(context->queue_scanner);
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queue_destroy(context->queue_loader);
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mtx_destroy(&context->mutex_scanner);
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cnd_destroy(&context->condition_not_full_scanner);
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cnd_destroy(&context->condition_not_empty_scanner);
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mtx_destroy(&context->mutex_loader);
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cnd_destroy(&context->condition_not_full_loader);
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cnd_destroy(&context->condition_not_empty_loader);
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mtx_destroy(&context->mutex_progress);
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free(context);
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}
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