src/common/readwrite.hpp

   1 #ifndef LTTNG_COMMON_READWRITE_H
   2 #define LTTNG_COMMON_READWRITE_H
   3
   4 /*
   5  * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  *
   7  * SPDX-License-Identifier: LGPL-2.1-only
   8  *
   9  */
  10
  11 #include <common/macros.hpp>
  12
  13 #include <unistd.h>
  14
  15 /*
  16  * lttng_read and lttng_write take care of EINTR and partial read/write.
  17  * Upon success, they return the "count" received as parameter.
  18  * They can return a negative value if an error occurs.
  19  * If a value lower than the requested "count" is returned, it means an
  20  * error occurred.
  21  * The error can be checked by querying errno.
  22  */
  23 ssize_t lttng_read(int fd, void *buf, size_t count);
  24 ssize_t lttng_write(int fd, const void *buf, size_t count);
  25
  26 #endif /* LTTNG_COMMON_READWRITE_H */