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/* executes a function in each worker context */
/** CollectFunc: the type of functions to execute in each workers context
* - wrk: the current worker
* - fdata: optional user data
* this data either must be persistent data, i.e. not connection related,
* or you have to specify a CollectFree func for it
* the return value will be placed in the GArray
typedef gpointer (*CollectFunc)(worker *wrk, gpointer fdata);
/** CollectCallback: the type of functions to call after a function was called in each workers context
* - cbdata: optional callback data
* depending on the data you should only use it when complete == TRUE
* - fdata : the data the CollectFunc got
* - result: the return values
* - complete: determines if the function was called in every context or was cancelled
* if this is FALSE, it may be called from another context than collect_start was called
typedef void (*CollectCallback)(gpointer cbdata, gpointer fdata, GPtrArray *result, gboolean complete);
typedef void (*CollectFree)(gpointer data);
struct collect_info;
typedef struct collect_info collect_info;
/* internal structure */
struct collect_info {
worker *wrk;
gint counter;
gboolean stopped;
CollectFunc func;
gpointer fdata;
CollectFree free_fdata;
CollectCallback cb;
gpointer cbdata;
GPtrArray *results;
LI_API collect_info* collect_start(worker *ctx, CollectFunc func, gpointer fdata, CollectFree free_fdata, CollectCallback cb, gpointer cbdata);
LI_API void collect_break(collect_info* ci); /** this will result in complete == FALSE in the callback */
/* internal functions */
LI_API void collect_watcher_cb(struct ev_loop *loop, ev_async *w, int revents);