diff options
Diffstat (limited to 'src/lib/system.h')
| -rw-r--r-- | src/lib/system.h | 131 |
1 files changed, 86 insertions, 45 deletions
diff --git a/src/lib/system.h b/src/lib/system.h index 3f9f0af5..f31cfd03 100644 --- a/src/lib/system.h +++ b/src/lib/system.h @@ -1,50 +1,30 @@ /* Declarations for common convenience functions. Copyright (C) 2006-2011 Red Hat, Inc. - This file is part of Red Hat elfutils. + This file is part of elfutils. - Red Hat elfutils is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by the - Free Software Foundation; version 2 of the License. + This file is free software; you can redistribute it and/or modify + it under the terms of either - Red Hat elfutils is distributed in the hope that it will be useful, but + * the GNU Lesser General Public License as published by the Free + Software Foundation; either version 3 of the License, or (at + your option) any later version + + or + + * the GNU General Public License as published by the Free + Software Foundation; either version 2 of the License, or (at + your option) any later version + + or both in parallel, as here. + + elfutils is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - You should have received a copy of the GNU General Public License along - with Red Hat elfutils; if not, write to the Free Software Foundation, - Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. - - In addition, as a special exception, Red Hat, Inc. gives You the - additional right to link the code of Red Hat elfutils with code licensed - under an Open Source Initiative certified open source license - (http://www.opensource.org/licenses/index.php) and to distribute linked - combinations including the two. Non-GPL Code permitted under this - exception must only link to the code of Red Hat elfutils through those - well defined interfaces identified in the file named EXCEPTION found in - the source code files (the "Approved Interfaces"). The files of Non-GPL - Code may instantiate templates or use macros or inline functions from - the Approved Interfaces without causing the resulting work to be covered - by the GNU General Public License. Only Red Hat, Inc. may make changes - or additions to the list of Approved Interfaces. Red Hat's grant of - this exception is conditioned upon your not adding any new exceptions. - If you wish to add a new Approved Interface or exception, please contact - Red Hat. You must obey the GNU General Public License in all respects - for all of the Red Hat elfutils code and other code used in conjunction - with Red Hat elfutils except the Non-GPL Code covered by this exception. - If you modify this file, you may extend this exception to your version - of the file, but you are not obligated to do so. If you do not wish to - provide this exception without modification, you must delete this - exception statement from your version and license this file solely under - the GPL without exception. - - Red Hat elfutils is an included package of the Open Invention Network. - An included package of the Open Invention Network is a package for which - Open Invention Network licensees cross-license their patents. No patent - license is granted, either expressly or impliedly, by designation as an - included package. Should you wish to participate in the Open Invention - Network licensing program, please visit www.openinventionnetwork.com - <http://www.openinventionnetwork.com>. */ + You should have received copies of the GNU General Public License and + the GNU Lesser General Public License along with this program. If + not, see <http://www.gnu.org/licenses/>. */ #ifndef LIB_SYSTEM_H #define LIB_SYSTEM_H 1 @@ -54,13 +34,18 @@ #include <stdint.h> #include <endian.h> #include <byteswap.h> +#include <unistd.h> #if __BYTE_ORDER == __LITTLE_ENDIAN # define LE32(n) (n) +# define LE64(n) (n) # define BE32(n) bswap_32 (n) +# define BE64(n) bswap_64 (n) #elif __BYTE_ORDER == __BIG_ENDIAN # define BE32(n) (n) +# define BE64(n) (n) # define LE32(n) bswap_32 (n) +# define LE64(n) bswap_64 (n) #else # error "Unknown byte order" #endif @@ -84,12 +69,61 @@ extern int crc32_file (int fd, uint32_t *resp); #define gettext_noop(Str) Str -#define pwrite_retry(fd, buf, len, off) \ - TEMP_FAILURE_RETRY (pwrite (fd, buf, len, off)) -#define write_retry(fd, buf, n) \ - TEMP_FAILURE_RETRY (write (fd, buf, n)) -#define pread_retry(fd, buf, len, off) \ - TEMP_FAILURE_RETRY (pread (fd, buf, len, off)) +static inline ssize_t __attribute__ ((unused)) +pwrite_retry (int fd, const void *buf, size_t len, off_t off) +{ + ssize_t recvd = 0; + + do + { + ssize_t ret = TEMP_FAILURE_RETRY (pwrite (fd, buf + recvd, len - recvd, + off + recvd)); + if (ret <= 0) + return ret < 0 ? ret : recvd; + + recvd += ret; + } + while ((size_t) recvd < len); + + return recvd; +} + +static inline ssize_t __attribute__ ((unused)) +write_retry (int fd, const void *buf, size_t len) +{ + ssize_t recvd = 0; + + do + { + ssize_t ret = TEMP_FAILURE_RETRY (write (fd, buf + recvd, len - recvd)); + if (ret <= 0) + return ret < 0 ? ret : recvd; + + recvd += ret; + } + while ((size_t) recvd < len); + + return recvd; +} + +static inline ssize_t __attribute__ ((unused)) +pread_retry (int fd, void *buf, size_t len, off_t off) +{ + ssize_t recvd = 0; + + do + { + ssize_t ret = TEMP_FAILURE_RETRY (pread (fd, buf + recvd, len - recvd, + off + recvd)); + if (ret <= 0) + return ret < 0 ? ret : recvd; + + recvd += ret; + } + while ((size_t) recvd < len); + + return recvd; +} /* We need define two variables, argp_program_version_hook and @@ -141,4 +175,11 @@ extern char *color_weak; extern const char color_off[]; +/* A static assertion. This will cause a compile-time error if EXPR, + which must be a compile-time constant, is false. */ + +#define eu_static_assert(expr) \ + extern int never_defined_just_used_for_checking[(expr) ? 1 : -1] \ + __attribute__ ((unused)) + #endif /* system.h */ |