projects / lttng-tools.git / blame
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|---|---|---|
| 33b14136 MD |
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 | * This library is free software; you can redistribute it and/or modify it | |
| 8 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
| 9 | * as published by the Free Software Foundation. | |
| 10 | * | |
| 11 | * This library is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License | |
| 14 | * for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU Lesser General Public License | |
| 17 | * along with this library; if not, write to the Free Software Foundation, | |
| 18 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 19 | */ | |
| 20 | ||
| 21 | #include <unistd.h> | |
| 73ec1cf9 | 22 | #include <common/macros.h> |
| 33b14136 MD |
23 | |
| 24 | /* | |
| 25 | * lttng_read and lttng_write take care of EINTR and partial read/write. | |
| 26 | * Upon success, they return the "count" received as parameter. | |
| 27 | * They can return a negative value if an error occurs. | |
| 28 | * If a value lower than the requested "count" is returned, it means an | |
| 83f4233d | 29 | * error occurred. |
| 33b14136 MD |
30 | * The error can be checked by querying errno. |
| 31 | */ | |
| 73ec1cf9 | 32 | LTTNG_HIDDEN |
| 33b14136 | 33 | ssize_t lttng_read(int fd, void *buf, size_t count); |
| 73ec1cf9 | 34 | LTTNG_HIDDEN |
| 33b14136 MD |
35 | ssize_t lttng_write(int fd, const void *buf, size_t count); |
| 36 | ||
| 37 | #endif /* LTTNG_COMMON_READWRITE_H */ |