Gearmand documentation, http://gearman.info/
#include <libgearman/gearman.h>
gearman_return_t gearman_client_run_tasks(gearman_client_st *client)
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gearman_client_run_tasks() executes one or more tasks that have been added via gearman_client_add_task(), gearman_client_add_task_status() or gearman_client_add_task_background().
gearman_client_run_tasks() can also be used with gearman_execute() if either non-blocking or background tasks were created with it.
gearman_return_t
If GEARMAN_PAUSE is returned one of the tasks has "paused" in order to give the caller an opportunity to take some actions (like read data, handle an exception, etc...). See gearman_task_st for more information about the state of a task.
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