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/* ------------------------------------------------------------------------- */
/*
* Copyright 2007-2021 GRAHAM DUMPLETON
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* ------------------------------------------------------------------------- */
#include "wsgi_thread.h"
#include "wsgi_server.h"
#if defined(__APPLE__)
#include <mach/mach_init.h>
#include <mach/thread_act.h>
#include <mach/mach_port.h>
#endif
#if defined(linux)
#include <unistd.h>
#include <sys/syscall.h>
#endif
/* ------------------------------------------------------------------------- */
int wsgi_total_threads;
int wsgi_request_threads;
apr_threadkey_t *wsgi_thread_key;
apr_array_header_t *wsgi_thread_details;
WSGIThreadInfo *wsgi_thread_info(int create, int request)
{
WSGIThreadInfo *thread_handle = NULL;
apr_threadkey_private_get((void**)&thread_handle, wsgi_thread_key);
if (!thread_handle && create) {
WSGIThreadInfo **entry = NULL;
if (!wsgi_thread_details) {
wsgi_thread_details = apr_array_make(
wsgi_server->process->pool, 3, sizeof(char*));
}
thread_handle = (WSGIThreadInfo *)apr_pcalloc(
wsgi_server->process->pool, sizeof(WSGIThreadInfo));
thread_handle->log_buffer = NULL;
thread_handle->thread_id = wsgi_total_threads++;
entry = (WSGIThreadInfo **)apr_array_push(wsgi_thread_details);
*entry = thread_handle;
apr_threadkey_private_set(thread_handle, wsgi_thread_key);
}
if (thread_handle && request && !thread_handle->request_thread) {
thread_handle->request_thread = 1;
wsgi_request_threads++;
}
return thread_handle;
}
/* ------------------------------------------------------------------------- */
int wsgi_thread_cpu_usage(WSGIThreadCPUUsage *usage)
{
#if defined(__APPLE__)
mach_port_t thread;
kern_return_t kr;
mach_msg_type_number_t count;
thread_basic_info_data_t info;
usage->user_time = 0.0;
usage->system_time = 0.0;
thread = mach_thread_self();
count = THREAD_BASIC_INFO_COUNT;
kr = thread_info(thread, THREAD_BASIC_INFO, (thread_info_t)&info, &count);
mach_port_deallocate(mach_task_self(), thread);
if (kr == KERN_SUCCESS && (info.flags & TH_FLAGS_IDLE) == 0) {
usage->user_time = info.user_time.seconds;
usage->user_time += info.user_time.microseconds / 1000000.0;
usage->system_time = info.system_time.seconds;
usage->system_time += info.system_time.microseconds / 1000000.0;
return 1;
}
#elif defined(linux) && defined(RUSAGE_THREAD)
struct rusage info;
usage->user_time = 0.0;
usage->system_time = 0.0;
if (getrusage(RUSAGE_THREAD, &info) == 0) {
usage->user_time = info.ru_utime.tv_sec;
usage->user_time += info.ru_utime.tv_usec / 1000000.0;
usage->system_time = info.ru_stime.tv_sec;
usage->system_time += info.ru_stime.tv_usec / 1000000.0;
return 1;
}
#elif defined(linux)
FILE* fp;
char filename[256];
char content[1024];
long tid;
/* Field 14. Numbering start at 1. */
int offset = 13;
char *p;
unsigned long user_time = 0;
unsigned long system_time = 0;
int ticks;
usage->user_time = 0.0;
usage->system_time = 0.0;
memset(content, '\0', sizeof(content));
tid = (long)syscall(SYS_gettid);
ticks = sysconf(_SC_CLK_TCK);
sprintf(filename, "/proc/%ld/stat", tid);
fp = fopen(filename, "r");
if (fp) {
if (fread(content, 1, sizeof(content)-1, fp)) {
p = content;
while (*p && offset) {
if (*p++ == ' ') {
offset--;
while (*p == ' ')
p++;
}
}
user_time = strtoul(p, &p, 10);
while (*p == ' ')
p++;
system_time = strtoul(p, &p, 10);
}
fclose(fp);
usage->user_time = (float)user_time / ticks;
usage->system_time = (float)system_time / ticks;
return 1;
}
#endif
return 0;
}
/* ------------------------------------------------------------------------- */
/* vi: set sw=4 expandtab : */
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