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104 lines
2.5 KiB
104 lines
2.5 KiB
libtraceevent(3) |
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================ |
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NAME |
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---- |
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tep_is_bigendian, tep_is_local_bigendian, tep_set_local_bigendian - Get / set |
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the endianness of the local machine. |
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SYNOPSIS |
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-------- |
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[verse] |
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-- |
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*#include <event-parse.h>* |
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enum *tep_endian* { |
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TEP_LITTLE_ENDIAN = 0, |
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TEP_BIG_ENDIAN |
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}; |
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int *tep_is_bigendian*(void); |
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bool *tep_is_local_bigendian*(struct tep_handle pass:[*]_tep_); |
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void *tep_set_local_bigendian*(struct tep_handle pass:[*]_tep_, enum tep_endian _endian_); |
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-- |
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DESCRIPTION |
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----------- |
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The _tep_is_bigendian()_ gets the endianness of the machine, executing |
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the function. |
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The _tep_is_local_bigendian()_ function gets the endianness of the local |
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machine, saved in the _tep_ handler. The _tep_ argument is the trace event |
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parser context. This API is a bit faster than _tep_is_bigendian()_, as it |
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returns cached endianness of the local machine instead of checking it each time. |
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The _tep_set_local_bigendian()_ function sets the endianness of the local |
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machine in the _tep_ handler. The _tep_ argument is trace event parser context. |
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The _endian_ argument is the endianness: |
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[verse] |
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-- |
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_TEP_LITTLE_ENDIAN_ - the machine is little endian, |
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_TEP_BIG_ENDIAN_ - the machine is big endian. |
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-- |
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RETURN VALUE |
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------------ |
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The _tep_is_bigendian()_ function returns non zero if the endianness of the |
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machine, executing the code, is big endian and zero otherwise. |
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The _tep_is_local_bigendian()_ function returns true, if the endianness of the |
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local machine, saved in the _tep_ handler, is big endian, or false otherwise. |
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EXAMPLE |
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------- |
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[source,c] |
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-- |
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#include <event-parse.h> |
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... |
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struct tep_handle *tep = tep_alloc(); |
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... |
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if (tep_is_bigendian()) |
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tep_set_local_bigendian(tep, TEP_BIG_ENDIAN); |
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else |
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tep_set_local_bigendian(tep, TEP_LITTLE_ENDIAN); |
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... |
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if (tep_is_local_bigendian(tep)) |
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printf("This machine you are running on is bigendian\n"); |
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else |
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printf("This machine you are running on is little endian\n"); |
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-- |
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FILES |
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----- |
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[verse] |
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-- |
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*event-parse.h* |
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Header file to include in order to have access to the library APIs. |
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*-ltraceevent* |
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Linker switch to add when building a program that uses the library. |
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-- |
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SEE ALSO |
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-------- |
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_libtraceevent(3)_, _trace-cmd(1)_ |
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AUTHOR |
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------ |
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[verse] |
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-- |
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*Steven Rostedt* <[email protected]>, author of *libtraceevent*. |
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*Tzvetomir Stoyanov* <[email protected]>, author of this man page. |
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-- |
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REPORTING BUGS |
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-------------- |
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Report bugs to <[email protected]> |
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LICENSE |
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------- |
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libtraceevent is Free Software licensed under the GNU LGPL 2.1 |
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RESOURCES |
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--------- |
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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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