Common Trace Format 2 generation

[deliverable/lttng-tools.git] / src / common / readwrite.hpp

diff --git a/src/common/readwrite.hpp b/src/common/readwrite.hpp
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+++ b/src/common/readwrite.hpp
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+#ifndef LTTNG_COMMON_READWRITE_H
+#define LTTNG_COMMON_READWRITE_H
+
+/*
+ * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <unistd.h>
+#include <common/macros.hpp>
+
+/*
+ * lttng_read and lttng_write take care of EINTR and partial read/write.
+ * Upon success, they return the "count" received as parameter.
+ * They can return a negative value if an error occurs.
+ * If a value lower than the requested "count" is returned, it means an
+ * error occurred.
+ * The error can be checked by querying errno.
+ */
+ssize_t lttng_read(int fd, void *buf, size_t count);
+ssize_t lttng_write(int fd, const void *buf, size_t count);
+
+#endif /* LTTNG_COMMON_READWRITE_H */