aoqi@0: /*
aoqi@0:  * Copyright 2012, 2013 SAP AG. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #include "runtime/arguments.hpp"
aoqi@0: #include "libperfstat_aix.hpp"
aoqi@0: 
aoqi@0: // For dlopen and friends
aoqi@0: #include <fcntl.h>
aoqi@0: 
aoqi@0: // handle to the libperfstat
aoqi@0: static void* g_libhandle = NULL;
aoqi@0: 
aoqi@0: // whether initialization worked
aoqi@0: static bool g_initialized = false;
aoqi@0: 
aoqi@0: 
aoqi@0: typedef int (*fun_perfstat_cpu_total_t) (perfstat_id_t *name, perfstat_cpu_total_t* userbuff,
aoqi@0:                                          int sizeof_userbuff, int desired_number);
aoqi@0: 
aoqi@0: typedef int (*fun_perfstat_memory_total_t) (perfstat_id_t *name, perfstat_memory_total_t* userbuff,
aoqi@0:                                             int sizeof_userbuff, int desired_number);
aoqi@0: 
aoqi@0: typedef void (*fun_perfstat_reset_t) ();
aoqi@0: 
aoqi@0: static fun_perfstat_cpu_total_t     g_fun_perfstat_cpu_total = NULL;
aoqi@0: static fun_perfstat_memory_total_t  g_fun_perfstat_memory_total = NULL;
aoqi@0: static fun_perfstat_reset_t         g_fun_perfstat_reset = NULL;
aoqi@0: 
aoqi@0: bool libperfstat::init() {
aoqi@0: 
aoqi@0:   if (g_initialized) {
aoqi@0:     return true;
aoqi@0:   }
aoqi@0: 
aoqi@0:   g_initialized = false;
aoqi@0: 
aoqi@0:   // dynamically load the libperfstat porting library.
aoqi@0:   g_libhandle = dlopen("/usr/lib/libperfstat.a(shr_64.o)", RTLD_MEMBER | RTLD_NOW);
aoqi@0:   if (!g_libhandle) {
aoqi@0:     if (Verbose) {
aoqi@0:       fprintf(stderr, "Cannot load libperfstat.a (dlerror: %s)", dlerror());
aoqi@0:     }
aoqi@0:     return false;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // resolve function pointers
aoqi@0: 
aoqi@0: #define RESOLVE_FUN_NO_ERROR(name) \
aoqi@0:   g_fun_##name = (fun_##name##_t) dlsym(g_libhandle, #name);
aoqi@0: 
aoqi@0: #define RESOLVE_FUN(name) \
aoqi@0:   RESOLVE_FUN_NO_ERROR(name) \
aoqi@0:   if (!g_fun_##name) { \
aoqi@0:     if (Verbose) { \
aoqi@0:       fprintf(stderr, "Cannot resolve " #name "() from libperfstat.a\n" \
aoqi@0:                       "   (dlerror: %s)", dlerror()); \
aoqi@0:       } \
aoqi@0:     return false; \
aoqi@0:   }
aoqi@0: 
aoqi@0:   RESOLVE_FUN(perfstat_cpu_total);
aoqi@0:   RESOLVE_FUN(perfstat_memory_total);
aoqi@0:   RESOLVE_FUN(perfstat_reset);
aoqi@0: 
aoqi@0:   g_initialized = true;
aoqi@0: 
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0: void libperfstat::cleanup() {
aoqi@0: 
aoqi@0:   g_initialized = false;
aoqi@0: 
aoqi@0:   if (g_libhandle) {
aoqi@0:     dlclose(g_libhandle);
aoqi@0:     g_libhandle = NULL;
aoqi@0:   }
aoqi@0: 
aoqi@0:   g_fun_perfstat_cpu_total = NULL;
aoqi@0:   g_fun_perfstat_memory_total = NULL;
aoqi@0:   g_fun_perfstat_reset = NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: int libperfstat::perfstat_memory_total(perfstat_id_t *name,
aoqi@0:                                        perfstat_memory_total_t* userbuff,
aoqi@0:                                        int sizeof_userbuff, int desired_number) {
aoqi@0:   assert(g_initialized, "libperfstat not initialized");
aoqi@0:   assert(g_fun_perfstat_memory_total, "");
aoqi@0:   return g_fun_perfstat_memory_total(name, userbuff, sizeof_userbuff, desired_number);
aoqi@0: }
aoqi@0: 
aoqi@0: int libperfstat::perfstat_cpu_total(perfstat_id_t *name, perfstat_cpu_total_t* userbuff,
aoqi@0:                                     int sizeof_userbuff, int desired_number) {
aoqi@0:   assert(g_initialized, "libperfstat not initialized");
aoqi@0:   assert(g_fun_perfstat_cpu_total, "");
aoqi@0:   return g_fun_perfstat_cpu_total(name, userbuff, sizeof_userbuff, desired_number);
aoqi@0: }
aoqi@0: 
aoqi@0: void libperfstat::perfstat_reset() {
aoqi@0:   assert(g_initialized, "libperfstat not initialized");
aoqi@0:   assert(g_fun_perfstat_reset, "");
aoqi@0:   g_fun_perfstat_reset();
aoqi@0: }