2 This file is a part of libcds - Concurrent Data Structures library
4 (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2016
6 Source code repo: http://github.com/khizmax/libcds/
7 Download: http://sourceforge.net/projects/libcds/files/
9 Redistribution and use in source and binary forms, with or without
10 modification, are permitted provided that the following conditions are met:
12 * Redistributions of source code must retain the above copyright notice, this
13 list of conditions and the following disclaimer.
15 * Redistributions in binary form must reproduce the above copyright notice,
16 this list of conditions and the following disclaimer in the documentation
17 and/or other materials provided with the distribution.
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
23 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
26 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #ifndef CDSLIB_OS_AIX_TIMER_H
32 #define CDSLIB_OS_AIX_TIMER_H
34 // Source: http://publib16.boulder.ibm.com/doc_link/en_US/a_doc_lib/libs/basetrf2/read_real_time.htm
36 #ifndef CDSLIB_OS_TIMER_H
37 # error "<cds/os/timer.h> must be included"
41 #include <sys/systemcfg.h>
44 namespace cds { namespace OS {
45 CDS_CXX11_INLINE_NAMESPACE namespace Aix {
47 // High resolution timer
49 timebasestruct_t m_tmStart;
52 static unsigned long long nano( native_timer_type const& nStart, native_timer_type const& nEnd )
54 return (((unsigned long long) (nEnd.tb_high - nStart.tb_high)) << 32) + (nEnd.tb_low - nStart.tb_low);
58 typedef timebasestruct_t native_timer_type;
59 typedef long long native_duration_type;
61 Timer() : m_tmStart( current()) {}
63 static native_timer_type current()
69 static void current( native_timer_type& tmr )
71 read_real_time( &tmr, sizeof(tmr));
72 time_base_to_time( &tmr, sizeof(tmr ));
79 double ret = nano( m_tmStart, tt ) / 1.0E9;
84 double duration( native_duration_type dur )
86 return double( dur ) / 1.0E9;
91 return duration( native_duration());
94 native_duration_type native_duration()
96 return native_duration( m_tmStart, current());
99 static native_duration_type native_duration( native_timer_type const & nStart, native_timer_type const & nEnd )
101 return nano( nStart, nEnd );
104 static unsigned long long random_seed()
106 native_timer_type tmr;
107 read_real_time( &tmr, sizeof(tmr));
108 return ( ((unsigned long long)(tmr.tb_hight)) << 32 ) + tmr.tb_low;
113 #ifndef CDS_CXX11_INLINE_NAMESPACE_SUPPORT
114 typedef Aix::Timer Timer;
117 }} // namespace cds::OS
120 #endif // #ifndef CDSLIB_OS_AIX_TIMER_H