atomicio.hh (5548:19d45fa7315c) atomicio.hh (11235:4162427127e9)
1/*
2 * Copyright (c) 2008 The Hewlett-Packard Development Company
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

--- 27 unchanged lines hidden (view full) ---

36// These functions keep reading/writing, if possible, until all data
37// has been transferred. Basically, try again when there's no error,
38// but there is data left also retry on EINTR.
39// This function blocks until it is done.
40
41ssize_t atomic_read(int fd, void *s, size_t n);
42ssize_t atomic_write(int fd, const void *s, size_t n);
43
1/*
2 * Copyright (c) 2008 The Hewlett-Packard Development Company
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

--- 27 unchanged lines hidden (view full) ---

36// These functions keep reading/writing, if possible, until all data
37// has been transferred. Basically, try again when there's no error,
38// but there is data left also retry on EINTR.
39// This function blocks until it is done.
40
41ssize_t atomic_read(int fd, void *s, size_t n);
42ssize_t atomic_write(int fd, const void *s, size_t n);
43
44/**
45 * Statically allocate a string and write it to a file descriptor.
46 *
47 * @warning The return value will from atomic_write will be ignored
48 * which means that errors will be ignored. This is normally fine as
49 * this macro is intended to be used in fatal signal handlers where
50 * error handling might not be feasible.
51 */
52#define STATIC_MSG(fd, m) \
53 do { \
54 static const char msg[] = m; \
55 atomic_write(fd, msg, sizeof(msg) - 1); \
56 } while(0)
57
58/**
59 * Statically allocate a string and write it to STDERR.
60 *
61 * @warning The return value will from atomic_write will be ignored
62 * which means that errors will be ignored. This is normally fine as
63 * this macro is intended to be used in fatal signal handlers where
64 * error handling might not be feasible.
65 */
66#define STATIC_ERR(m) STATIC_MSG(STDERR_FILENO, m)
67
44#endif // __BASE_ATOMICIO_HH__
68#endif // __BASE_ATOMICIO_HH__