102 lines
2.5 KiB
Plaintext
102 lines
2.5 KiB
Plaintext
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libtraceevent(3)
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================
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NAME
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----
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tep_alloc, tep_free,tep_ref, tep_unref,tep_get_ref - Create, destroy, manage
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references of trace event parser context.
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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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struct tep_handle pass:[*]*tep_alloc*(void);
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void *tep_free*(struct tep_handle pass:[*]_tep_);
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void *tep_ref*(struct tep_handle pass:[*]_tep_);
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void *tep_unref*(struct tep_handle pass:[*]_tep_);
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int *tep_get_ref*(struct tep_handle pass:[*]_tep_);
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--
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DESCRIPTION
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-----------
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These are the main functions to create and destroy tep_handle - the main
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structure, representing the trace event parser context. This context is used as
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the input parameter of most library APIs.
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The _tep_alloc()_ function allocates and initializes the tep context.
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The _tep_free()_ function will decrement the reference of the _tep_ handler.
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When there is no more references, then it will free the handler, as well
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as clean up all its resources that it had used. The argument _tep_ is
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the pointer to the trace event parser context.
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The _tep_ref()_ function adds a reference to the _tep_ handler.
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The _tep_unref()_ function removes a reference from the _tep_ handler. When
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the last reference is removed, the _tep_ is destroyed, and all resources that
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it had used are cleaned up.
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The _tep_ref_get()_ functions gets the current references of the _tep_ handler.
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RETURN VALUE
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------------
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_tep_alloc()_ returns a pointer to a newly created tep_handle structure.
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NULL is returned in case there is not enough free memory to allocate it.
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_tep_ref_get()_ returns the current references of _tep_.
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If _tep_ is NULL, 0 is returned.
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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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int ref = tep_get_ref(tep);
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tep_ref(tep);
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if ( (ref+1) != tep_get_ref(tep)) {
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/* Something wrong happened, the counter is not incremented by 1 */
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}
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tep_unref(tep);
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...
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tep_free(tep);
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...
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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* <rostedt@goodmis.org>, author of *libtraceevent*.
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*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, 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 <linux-trace-devel@vger.kernel.org>
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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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