77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
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#include <world/update/internal.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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tc_world_updater_queue_s tc_new_world_updater_queue(u32_t capacity)
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{
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tc_world_updater_queue_s queue;
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queue.capacity = capacity;
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queue.commands = calloc(sizeof(tc_world_updater_command_s), capacity);
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queue.first = NULL;
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queue.last = NULL;
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queue.in_action = FALSE;
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return queue;
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}
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// tc_allocate_world_updater_command: Returns a pointer to a command-slot in the given queue.
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// Sub-function of tc_issue_world_updater_command
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tc_world_updater_command_s * tc_allocate_world_updater_command(tc_world_updater_queue_s *queue)
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{
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u32_t command_index = 0;
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while(command_index < queue->capacity)
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{
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if(!queue->commands[command_index].is_used)
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return &queue->commands[command_index];
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++command_index;
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}
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return NULL;
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}
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bool_t tc_issue_world_updater_command(tc_world_updater_queue_s *queue, tc_world_updater_command_s command)
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{
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while(queue->in_action) continue;
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queue->in_action = TRUE;
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tc_world_updater_command_s *queue_command = tc_allocate_world_updater_command(queue);
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if(queue_command == NULL) return FALSE;
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command.is_used = TRUE;
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(*queue_command) = command;
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queue_command->previous = queue->last;
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queue_command->next = NULL;
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if(queue->last != NULL) queue->last->next = queue_command;
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if(queue->first == NULL) queue->first = queue_command;
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queue->last = queue_command;
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queue->in_action = FALSE;
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return TRUE;
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}
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tc_world_updater_command_s tc_world_updater_query_next_command(tc_world_updater_queue_s *queue)
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{
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while(queue->in_action) continue;
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queue->in_action = TRUE;
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tc_world_updater_command_s *queue_command = queue->first;
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tc_world_updater_command_s command;
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memset(&command, 0x00, sizeof(tc_world_updater_command_s));
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if(queue_command != NULL)
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{
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command = *queue_command;
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queue_command->is_used = FALSE;
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}
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queue->in_action = FALSE;
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return command;
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}
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