#pragma once

#include <pthread.h>

/* Thread management tools modeled on https://golang.org/pkg/sync/#WaitGroup */

/* pthread_cond_t is overly complicated. Just use a self-pipe. */

struct wg {
	int count;
	pthread_mutex_t lock;
	int fd_wait;
	int fd_signal;
};

void wg_init(struct wg *);
void wg_add(struct wg *, unsigned int);
void wg_sub(struct wg *, unsigned int);
void wg_wait(struct wg*);