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diff --git a/lib/private.h b/lib/private.h
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+++ b/lib/private.h
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+/* PipeWire AGL Cluster IPC
+ *
+ * Copyright © 2021 Collabora Ltd.
+ * @author Julian Bouzas <julian.bouzas@collabora.com>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#ifndef __ICIPC_PRIVATE_H__
+#define __ICIPC_PRIVATE_H__
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <pthread.h>
+#include <stddef.h>
+#include <sys/types.h>
+#include <stdarg.h>
+
+#include "defs.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* log */
+
+#define icipc_log_info(F, ...) \
+ icipc_log(ICIPC_LOG_LEVEL_INFO, (F), ##__VA_ARGS__)
+#define icipc_log_warn(F, ...) \
+ icipc_log(ICIPC_LOG_LEVEL_WARN, (F), ##__VA_ARGS__)
+#define icipc_log_error(F, ...) \
+ icipc_log(ICIPC_LOG_LEVEL_ERROR, (F), ##__VA_ARGS__)
+
+enum icipc_log_level {
+ ICIPC_LOG_LEVEL_NONE = 0,
+ ICIPC_LOG_LEVEL_ERROR,
+ ICIPC_LOG_LEVEL_WARN,
+ ICIPC_LOG_LEVEL_INFO,
+};
+
+void
+icipc_logv (enum icipc_log_level level,
+ const char *fmt,
+ va_list args) __attribute__ ((format (printf, 2, 0)));
+
+void
+icipc_log (enum icipc_log_level level,
+ const char *fmt,
+ ...) __attribute__ ((format (printf, 2, 3)));
+
+/* socket */
+
+ssize_t
+icipc_socket_write (int fd, const uint8_t *buffer, size_t size);
+
+ssize_t
+icipc_socket_read (int fd, uint8_t **buffer, size_t *max_size);
+
+/* epoll thread */
+
+struct epoll_thread;
+
+typedef void (*icipc_epoll_thread_event_funct_t) (struct epoll_thread *self,
+ int fd,
+ void *data);
+
+struct epoll_thread {
+ int socket_fd;
+ int epoll_fd;
+ int event_fd;
+ pthread_t thread;
+ icipc_epoll_thread_event_funct_t socket_event_func;
+ icipc_epoll_thread_event_funct_t other_event_func;
+ void *event_data;
+};
+
+bool
+icipc_epoll_thread_init (struct epoll_thread *self,
+ int socket_fd,
+ icipc_epoll_thread_event_funct_t sock_func,
+ icipc_epoll_thread_event_funct_t other_func,
+ void *data);
+
+bool
+icipc_epoll_thread_start (struct epoll_thread *self);
+
+void
+icipc_epoll_thread_stop (struct epoll_thread *self);
+
+void
+icipc_epoll_thread_destroy (struct epoll_thread *self);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif