src/testcurl/perf_get_concurrent.c - manifest_repos/libmicrohttpd - Git at Google

 /*
      This file is part of libmicrohttpd
      Copyright (C) 2007, 2009, 2011 Christian Grothoff
      Copyright (C) 2014-2022 Evgeny Grin (Karlson2k)

      libmicrohttpd is free software; you can redistribute it and/or modify
      it under the terms of the GNU General Public License as published
      by the Free Software Foundation; either version 2, or (at your
      option) any later version.

      libmicrohttpd is distributed in the hope that it will be useful, but
      WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      General Public License for more details.

      You should have received a copy of the GNU General Public License
      along with libmicrohttpd; see the file COPYING.  If not, write to the
      Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
      Boston, MA 02110-1301, USA.
 */

 /**
  * @file perf_get_concurrent.c
  * @brief benchmark concurrent GET operations
  *        Note that we run libcurl on the machine at the
  *        same time, so the execution time may be influenced
  *        by the concurrent activity; it is quite possible
  *        that more time is spend with libcurl than with MHD,
  *        so the performance scores calculated with this code
  *        should NOT be used to compare with other HTTP servers
  *        (since MHD is actually better); only the relative
  *        scores between MHD versions are meaningful.
  * @author Christian Grothoff
  * @author Karlson2k (Evgeny Grin)
  */

 #include "MHD_config.h"
 #include "platform.h"
 #include <curl/curl.h>
 #include <microhttpd.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
 #include <pthread.h>
 #include "mhd_has_in_name.h"

 #if defined(MHD_CPU_COUNT) && (MHD_CPU_COUNT + 0) < 2
 #undef MHD_CPU_COUNT
 #endif
 #if ! defined(MHD_CPU_COUNT)
 #define MHD_CPU_COUNT 2
 #endif

 /**
  * How many rounds of operations do we do for each
  * test (total number of requests will be ROUNDS * PAR).
  * Ensure that free ports are not exhausted during test.
  */
 #if MHD_CPU_COUNT > 8
 #ifndef _WIN32
 #define ROUNDS (1 + (30000 / 12) / MHD_CPU_COUNT)
 #else /* _WIN32 */
 #define ROUNDS (1 + (3000 / 12) / MHD_CPU_COUNT)
 #endif /* _WIN32 */
 #else
 #define ROUNDS 500
 #endif

 /**
  * How many requests do we do in parallel?
  */
 #define PAR MHD_CPU_COUNT

 /**
  * Do we use HTTP 1.1?
  */
 static int oneone;

 /**
  * Response to return (re-used).
  */
 static struct MHD_Response *response;

 /**
  * Time this round was started.
  */
 static unsigned long long start_time;

 /**
  * Set to 1 if the worker threads are done.
  */
 static volatile int signal_done;


 /**
  * Get the current timestamp
  *
  * @return current time in ms
  */
 static unsigned long long
 now (void)
 {
   struct timeval tv;

   gettimeofday (&tv, NULL);
   return (((unsigned long long) tv.tv_sec * 1000LL)
           + ((unsigned long long) tv.tv_usec / 1000LL));
 }


 /**
  * Start the timer.
  */
 static void
 start_timer (void)
 {
   start_time = now ();
 }


 /**
  * Stop the timer and report performance
  *
  * @param desc description of the threading mode we used
  */
 static void
 stop (const char *desc)
 {
   double rps = ((double) (PAR * ROUNDS * 1000)) / ((double) (now ()
                                                              - start_time));

   fprintf (stderr,
            "Parallel GETs using %s: %f %s\n",
            desc,
            rps,
            "requests/s");
 }


 static size_t
 copyBuffer (void *ptr,
             size_t size, size_t nmemb,
             void *ctx)
 {
   (void) ptr; (void) ctx;          /* Unused. Silent compiler warning. */
   return size * nmemb;
 }


 static enum MHD_Result
 ahc_echo (void *cls,
           struct MHD_Connection *connection,
           const char *url,
           const char *method,
           const char *version,
           const char *upload_data, size_t *upload_data_size,
           void **req_cls)
 {
   static int ptr;
   enum MHD_Result ret;
   (void) cls;
   (void) url; (void) version;                      /* Unused. Silent compiler warning. */
   (void) upload_data; (void) upload_data_size;     /* Unused. Silent compiler warning. */

   if (0 != strcmp (MHD_HTTP_METHOD_GET, method))
     return MHD_NO;              /* unexpected method */
   if (&ptr != *req_cls)
   {
     *req_cls = &ptr;
     return MHD_YES;
   }
   *req_cls = NULL;
   ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
   if (ret == MHD_NO)
     abort ();
   return ret;
 }


 static void *
 thread_gets (void *param)
 {
   CURL *c;
   CURLcode errornum;
   unsigned int i;
   char *const url = (char *) param;
   static char curl_err_marker[] = "curl error";

   c = curl_easy_init ();
   curl_easy_setopt (c, CURLOPT_URL, url);
   curl_easy_setopt (c, CURLOPT_WRITEFUNCTION, &copyBuffer);
   curl_easy_setopt (c, CURLOPT_WRITEDATA, NULL);
   curl_easy_setopt (c, CURLOPT_FAILONERROR, 1L);
   curl_easy_setopt (c, CURLOPT_TIMEOUT, 150L);
   if (oneone)
     curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
   else
     curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
   curl_easy_setopt (c, CURLOPT_CONNECTTIMEOUT, 150L);
   /* NOTE: use of CONNECTTIMEOUT without also
      setting NOSIGNAL results in really weird
      crashes on my system! */
   curl_easy_setopt (c, CURLOPT_NOSIGNAL, 1L);
   for (i = 0; i < ROUNDS; i++)
   {
     if (CURLE_OK != (errornum = curl_easy_perform (c)))
     {
       fprintf (stderr,
                "curl_easy_perform failed: `%s'\n",
                curl_easy_strerror (errornum));
       curl_easy_cleanup (c);
       return curl_err_marker;
     }
   }
   curl_easy_cleanup (c);

   return NULL;
 }


 static void *
 do_gets (void *param)
 {
   int j;
   pthread_t par[PAR];
   char url[64];
   uint16_t port = (uint16_t) (intptr_t) param;
   char *err = NULL;
   static char pthr_err_marker[] = "pthread_create error";

   snprintf (url,
             sizeof (url),
             "http://127.0.0.1:%u/hello_world",
             (unsigned int) port);
   for (j = 0; j < PAR; j++)
   {
     if (0 != pthread_create (&par[j], NULL, &thread_gets, (void *) url))
     {
       for (j--; j >= 0; j--)
         pthread_join (par[j], NULL);
       return pthr_err_marker;
     }
   }
   for (j = 0; j < PAR; j++)
   {
     char *ret_val;
     if ((0 != pthread_join (par[j], (void **) &ret_val)) ||
         (NULL != ret_val) )
       err = ret_val;
   }
   signal_done = 1;
   return err;
 }


 static unsigned int
 testInternalGet (uint16_t port, uint32_t poll_flag)
 {
   struct MHD_Daemon *d;
   const char *const test_desc = ((poll_flag & MHD_USE_AUTO) ?
                                  "internal thread with 'auto'" :
                                  (poll_flag & MHD_USE_POLL) ?
                                  "internal thread with poll()" :
                                  (poll_flag & MHD_USE_EPOLL) ?
                                  "internal thread with epoll" :
                                  "internal thread with select()");
   const char *ret_val;

   if (MHD_NO != MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT))
     port = 0;

   signal_done = 0;
   d = MHD_start_daemon (MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG
                         | (enum MHD_FLAG) poll_flag,
                         port, NULL, NULL, &ahc_echo, NULL, MHD_OPTION_END);
   if (d == NULL)
     return 1;
   if (0 == port)
   {
     const union MHD_DaemonInfo *dinfo;
     dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
     if ((NULL == dinfo) || (0 == dinfo->port) )
     {
       MHD_stop_daemon (d); return 32;
     }
     port = dinfo->port;
   }
   start_timer ();
   ret_val = do_gets ((void *) (intptr_t) port);
   if (! ret_val)
     stop (test_desc);
   MHD_stop_daemon (d);
   if (ret_val)
   {
     fprintf (stderr,
              "Error performing %s test: %s\n", test_desc, ret_val);
     return 4;
   }
   return 0;
 }


 static unsigned int
 testMultithreadedGet (uint16_t port, uint32_t poll_flag)
 {
   struct MHD_Daemon *d;
   const char *const test_desc = ((poll_flag & MHD_USE_AUTO) ?
                                  "internal thread with 'auto' and thread per connection"
                                  :
                                  (poll_flag & MHD_USE_POLL) ?
                                  "internal thread with poll() and thread per connection"
                                  :
                                  (poll_flag & MHD_USE_EPOLL) ?
                                  "internal thread with epoll and thread per connection"
                                  :
                                  "internal thread with select() and thread per connection");
   const char *ret_val;

   if (MHD_NO != MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT))
     port = 0;

   signal_done = 0;
   d = MHD_start_daemon (MHD_USE_THREAD_PER_CONNECTION
                         | MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG
                         | (enum MHD_FLAG) poll_flag,
                         port, NULL, NULL, &ahc_echo, NULL, MHD_OPTION_END);
   if (d == NULL)
     return 16;
   if (0 == port)
   {
     const union MHD_DaemonInfo *dinfo;
     dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
     if ((NULL == dinfo) || (0 == dinfo->port) )
     {
       MHD_stop_daemon (d); return 32;
     }
     port = dinfo->port;
   }
   start_timer ();
   ret_val = do_gets ((void *) (intptr_t) port);
   if (! ret_val)
     stop (test_desc);
   MHD_stop_daemon (d);
   if (ret_val)
   {
     fprintf (stderr,
              "Error performing %s test: %s\n", test_desc, ret_val);
     return 4;
   }
   return 0;
 }


 static unsigned int
 testMultithreadedPoolGet (uint16_t port, uint32_t poll_flag)
 {
   struct MHD_Daemon *d;
   const char *const test_desc = ((poll_flag & MHD_USE_AUTO) ?
                                  "internal thread pool with 'auto'" :
                                  (poll_flag & MHD_USE_POLL) ?
                                  "internal thread pool with poll()" :
                                  (poll_flag & MHD_USE_EPOLL) ?
                                  "internal thread poll with epoll" :
                                  "internal thread pool with select()");
   const char *ret_val;

   if (MHD_NO != MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT))
     port = 0;

   signal_done = 0;
   d = MHD_start_daemon (MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG
                         | (enum MHD_FLAG) poll_flag,
                         port, NULL, NULL, &ahc_echo, NULL,
                         MHD_OPTION_THREAD_POOL_SIZE, MHD_CPU_COUNT,
                         MHD_OPTION_END);
   if (d == NULL)
     return 16;
   if (0 == port)
   {
     const union MHD_DaemonInfo *dinfo;
     dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
     if ((NULL == dinfo) || (0 == dinfo->port) )
     {
       MHD_stop_daemon (d); return 32;
     }
     port = dinfo->port;
   }
   start_timer ();
   ret_val = do_gets ((void *) (intptr_t) port);
   if (! ret_val)
     stop (test_desc);
   MHD_stop_daemon (d);
   if (ret_val)
   {
     fprintf (stderr,
              "Error performing %s test: %s\n", test_desc, ret_val);
     return 4;
   }
   return 0;
 }


 static unsigned int
 testExternalGet (uint16_t port)
 {
   struct MHD_Daemon *d;
   pthread_t pid;
   fd_set rs;
   fd_set ws;
   fd_set es;
   MHD_socket max;
   struct timeval tv;
   uint64_t tt64;
   int tret;
   char *ret_val;
   int ret = 0;

   if (MHD_NO != MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT))
     port = 0;

   signal_done = 0;
   d = MHD_start_daemon (MHD_USE_ERROR_LOG,
                         port, NULL, NULL, &ahc_echo, NULL, MHD_OPTION_END);
   if (d == NULL)
     return 256;
   if (0 == port)
   {
     const union MHD_DaemonInfo *dinfo;
     dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
     if ((NULL == dinfo) || (0 == dinfo->port) )
     {
       MHD_stop_daemon (d); return 32;
     }
     port = dinfo->port;
   }
   if (0 != pthread_create (&pid, NULL,
                            &do_gets, (void *) (intptr_t) port))
   {
     MHD_stop_daemon (d);
     return 512;
   }
   start_timer ();

   while (0 == signal_done)
   {
     max = 0;
     FD_ZERO (&rs);
     FD_ZERO (&ws);
     FD_ZERO (&es);
     if (MHD_YES != MHD_get_fdset (d, &rs, &ws, &es, &max))
     {
       MHD_stop_daemon (d);
       return 4096;
     }
     tret = MHD_get_timeout64 (d, &tt64);
     if (MHD_YES != tret)
       tt64 = 1;
 #if ! defined(_WIN32) || defined(__CYGWIN__)
     tv.tv_sec = (time_t) (tt64 / 1000);
 #else  /* Native W32 */
     tv.tv_sec = (long) (tt64 / 1000);
 #endif /* Native W32 */
     tv.tv_usec = ((long) (tt64 % 1000)) * 1000;
     if (-1 == select (max + 1, &rs, &ws, &es, &tv))
     {
 #ifdef MHD_POSIX_SOCKETS
       if (EINTR != errno)
       {
         fprintf (stderr, "Unexpected select() error: %d. Line: %d\n",
                  (int) errno, __LINE__);
         fflush (stderr);
         exit (99);
       }
       ret |= 1024;
       break;
 #else
       if ((WSAEINVAL != WSAGetLastError ()) ||
           (0 != rs.fd_count) || (0 != ws.fd_count) || (0 != es.fd_count) )
       {
         fprintf (stderr, "Unexpected select() error: %d. Line: %d\n",
                  (int) WSAGetLastError (), __LINE__);
         fflush (stderr);
         exit (99);
       }
       Sleep (1);
 #endif
     }
     MHD_run_from_select (d, &rs, &ws, &es);
   }

   stop ("external select");
   MHD_stop_daemon (d);
   if ((0 != pthread_join (pid, (void **) &ret_val)) ||
       (NULL != ret_val) )
   {
     fprintf (stderr,
              "%s\n", ret_val);
     ret |= 8;
   }
   if (ret)
     fprintf (stderr, "Error performing test.\n");
   return 0;
 }


 int
 main (int argc, char *const *argv)
 {
   unsigned int errorCount = 0;
   uint16_t port = 1100;
   (void) argc;   /* Unused. Silent compiler warning. */

   if ((NULL == argv) || (0 == argv[0]))
     return 99;
   oneone = has_in_name (argv[0], "11");
   if (oneone)
     port += 15;
   if (0 != curl_global_init (CURL_GLOBAL_WIN32))
     return 2;
   response = MHD_create_response_from_buffer_copy (strlen ("/hello_world"),
                                                    "/hello_world");
   errorCount += testInternalGet (port++, 0);
   errorCount += testMultithreadedGet (port++, 0);
   errorCount += testMultithreadedPoolGet (port++, 0);
   errorCount += testExternalGet (port++);
   errorCount += testInternalGet (port++, MHD_USE_AUTO);
   errorCount += testMultithreadedGet (port++, MHD_USE_AUTO);
   errorCount += testMultithreadedPoolGet (port++, MHD_USE_AUTO);
   if (MHD_YES == MHD_is_feature_supported (MHD_FEATURE_POLL))
   {
     errorCount += testInternalGet (port++, MHD_USE_POLL);
     errorCount += testMultithreadedGet (port++, MHD_USE_POLL);
     errorCount += testMultithreadedPoolGet (port++, MHD_USE_POLL);
   }
   if (MHD_YES == MHD_is_feature_supported (MHD_FEATURE_EPOLL))
   {
     errorCount += testInternalGet (port++, MHD_USE_EPOLL);
     errorCount += testMultithreadedPoolGet (port++, MHD_USE_EPOLL);
   }
   MHD_destroy_response (response);
   if (errorCount != 0)
     fprintf (stderr, "Error (code: %u)\n", errorCount);
   curl_global_cleanup ();
   return errorCount != 0;       /* 0 == pass */
 }
	/*
	This file is part of libmicrohttpd
	Copyright (C) 2007, 2009, 2011 Christian Grothoff
	Copyright (C) 2014-2022 Evgeny Grin (Karlson2k)

	libmicrohttpd is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published
	by the Free Software Foundation; either version 2, or (at your
	option) any later version.

	libmicrohttpd is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with libmicrohttpd; see the file COPYING. If not, write to the
	Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	Boston, MA 02110-1301, USA.
	*/

	/**
	* @file perf_get_concurrent.c
	* @brief benchmark concurrent GET operations
	* Note that we run libcurl on the machine at the
	* same time, so the execution time may be influenced
	* by the concurrent activity; it is quite possible
	* that more time is spend with libcurl than with MHD,
	* so the performance scores calculated with this code
	* should NOT be used to compare with other HTTP servers
	* (since MHD is actually better); only the relative
	* scores between MHD versions are meaningful.
	* @author Christian Grothoff
	* @author Karlson2k (Evgeny Grin)
	*/

	#include "MHD_config.h"
	#include "platform.h"
	#include <curl/curl.h>
	#include <microhttpd.h>
	#include <stdlib.h>
	#include <string.h>
	#include <time.h>
	#include <pthread.h>
	#include "mhd_has_in_name.h"

	#if defined(MHD_CPU_COUNT) && (MHD_CPU_COUNT + 0) < 2
	#undef MHD_CPU_COUNT
	#endif
	#if ! defined(MHD_CPU_COUNT)
	#define MHD_CPU_COUNT 2
	#endif

	/**
	* How many rounds of operations do we do for each
	* test (total number of requests will be ROUNDS * PAR).
	* Ensure that free ports are not exhausted during test.
	*/
	#if MHD_CPU_COUNT > 8
	#ifndef _WIN32
	#define ROUNDS (1 + (30000 / 12) / MHD_CPU_COUNT)
	#else /* _WIN32 */
	#define ROUNDS (1 + (3000 / 12) / MHD_CPU_COUNT)
	#endif /* _WIN32 */
	#else
	#define ROUNDS 500
	#endif

	/**
	* How many requests do we do in parallel?
	*/
	#define PAR MHD_CPU_COUNT

	/**
	* Do we use HTTP 1.1?
	*/
	static int oneone;

	/**
	* Response to return (re-used).
	*/
	static struct MHD_Response *response;

	/**
	* Time this round was started.
	*/
	static unsigned long long start_time;

	/**
	* Set to 1 if the worker threads are done.
	*/
	static volatile int signal_done;


	/**
	* Get the current timestamp
	*
	* @return current time in ms
	*/
	static unsigned long long
	now (void)
	{
	struct timeval tv;

	gettimeofday (&tv, NULL);
	return (((unsigned long long) tv.tv_sec * 1000LL)
	+ ((unsigned long long) tv.tv_usec / 1000LL));
	}


	/**
	* Start the timer.
	*/
	static void
	start_timer (void)
	{
	start_time = now ();
	}


	/**
	* Stop the timer and report performance
	*
	* @param desc description of the threading mode we used
	*/
	static void
	stop (const char *desc)
	{
	double rps = ((double) (PAR * ROUNDS * 1000)) / ((double) (now ()
	- start_time));

	fprintf (stderr,
	"Parallel GETs using %s: %f %s\n",
	desc,
	rps,
	"requests/s");
	}


	static size_t
	copyBuffer (void *ptr,
	size_t size, size_t nmemb,
	void *ctx)
	{
	(void) ptr; (void) ctx; /* Unused. Silent compiler warning. */
	return size * nmemb;
	}


	static enum MHD_Result
	ahc_echo (void *cls,
	struct MHD_Connection *connection,
	const char *url,
	const char *method,
	const char *version,
	const char upload_data, size_t upload_data_size,
	void **req_cls)
	{
	static int ptr;
	enum MHD_Result ret;
	(void) cls;
	(void) url; (void) version; /* Unused. Silent compiler warning. */
	(void) upload_data; (void) upload_data_size; /* Unused. Silent compiler warning. */

	if (0 != strcmp (MHD_HTTP_METHOD_GET, method))
	return MHD_NO; /* unexpected method */
	if (&ptr != *req_cls)
	{
	*req_cls = &ptr;
	return MHD_YES;
	}
	*req_cls = NULL;
	ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
	if (ret == MHD_NO)
	abort ();
	return ret;
	}


	static void *
	thread_gets (void *param)
	{
	CURL *c;
	CURLcode errornum;
	unsigned int i;
	char const url = (char ) param;
	static char curl_err_marker[] = "curl error";

	c = curl_easy_init ();
	curl_easy_setopt (c, CURLOPT_URL, url);
	curl_easy_setopt (c, CURLOPT_WRITEFUNCTION, &copyBuffer);
	curl_easy_setopt (c, CURLOPT_WRITEDATA, NULL);
	curl_easy_setopt (c, CURLOPT_FAILONERROR, 1L);
	curl_easy_setopt (c, CURLOPT_TIMEOUT, 150L);
	if (oneone)
	curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
	else
	curl_easy_setopt (c, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
	curl_easy_setopt (c, CURLOPT_CONNECTTIMEOUT, 150L);
	/* NOTE: use of CONNECTTIMEOUT without also
	setting NOSIGNAL results in really weird
	crashes on my system! */
	curl_easy_setopt (c, CURLOPT_NOSIGNAL, 1L);
	for (i = 0; i < ROUNDS; i++)
	{
	if (CURLE_OK != (errornum = curl_easy_perform (c)))
	{
	fprintf (stderr,
	"curl_easy_perform failed: `%s'\n",
	curl_easy_strerror (errornum));
	curl_easy_cleanup (c);
	return curl_err_marker;
	}
	}
	curl_easy_cleanup (c);

	return NULL;
	}


	static void *
	do_gets (void *param)
	{
	int j;
	pthread_t par[PAR];
	char url[64];
	uint16_t port = (uint16_t) (intptr_t) param;
	char *err = NULL;
	static char pthr_err_marker[] = "pthread_create error";

	snprintf (url,
	sizeof (url),
	"http://127.0.0.1:%u/hello_world",
	(unsigned int) port);
	for (j = 0; j < PAR; j++)
	{
	if (0 != pthread_create (&par[j], NULL, &thread_gets, (void *) url))
	{
	for (j--; j >= 0; j--)
	pthread_join (par[j], NULL);
	return pthr_err_marker;
	}
	}
	for (j = 0; j < PAR; j++)
	{
	char *ret_val;
	if ((0 != pthread_join (par[j], (void **) &ret_val)) \|\|
	(NULL != ret_val) )
	err = ret_val;
	}
	signal_done = 1;
	return err;
	}


	static unsigned int
	testInternalGet (uint16_t port, uint32_t poll_flag)
	{
	struct MHD_Daemon *d;
	const char *const test_desc = ((poll_flag & MHD_USE_AUTO) ?
	"internal thread with 'auto'" :
	(poll_flag & MHD_USE_POLL) ?
	"internal thread with poll()" :
	(poll_flag & MHD_USE_EPOLL) ?
	"internal thread with epoll" :
	"internal thread with select()");
	const char *ret_val;

	if (MHD_NO != MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT))
	port = 0;

	signal_done = 0;
	d = MHD_start_daemon (MHD_USE_INTERNAL_POLLING_THREAD \| MHD_USE_ERROR_LOG
	\| (enum MHD_FLAG) poll_flag,
	port, NULL, NULL, &ahc_echo, NULL, MHD_OPTION_END);
	if (d == NULL)
	return 1;
	if (0 == port)
	{
	const union MHD_DaemonInfo *dinfo;
	dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
	if ((NULL == dinfo) \|\| (0 == dinfo->port) )
	{
	MHD_stop_daemon (d); return 32;
	}
	port = dinfo->port;
	}
	start_timer ();
	ret_val = do_gets ((void *) (intptr_t) port);
	if (! ret_val)
	stop (test_desc);
	MHD_stop_daemon (d);
	if (ret_val)
	{
	fprintf (stderr,
	"Error performing %s test: %s\n", test_desc, ret_val);
	return 4;
	}
	return 0;
	}


	static unsigned int
	testMultithreadedGet (uint16_t port, uint32_t poll_flag)
	{
	struct MHD_Daemon *d;
	const char *const test_desc = ((poll_flag & MHD_USE_AUTO) ?
	"internal thread with 'auto' and thread per connection"
	:
	(poll_flag & MHD_USE_POLL) ?
	"internal thread with poll() and thread per connection"
	:
	(poll_flag & MHD_USE_EPOLL) ?
	"internal thread with epoll and thread per connection"
	:
	"internal thread with select() and thread per connection");
	const char *ret_val;

	if (MHD_NO != MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT))
	port = 0;

	signal_done = 0;
	d = MHD_start_daemon (MHD_USE_THREAD_PER_CONNECTION
	\| MHD_USE_INTERNAL_POLLING_THREAD \| MHD_USE_ERROR_LOG
	\| (enum MHD_FLAG) poll_flag,
	port, NULL, NULL, &ahc_echo, NULL, MHD_OPTION_END);
	if (d == NULL)
	return 16;
	if (0 == port)
	{
	const union MHD_DaemonInfo *dinfo;
	dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
	if ((NULL == dinfo) \|\| (0 == dinfo->port) )
	{
	MHD_stop_daemon (d); return 32;
	}
	port = dinfo->port;
	}
	start_timer ();
	ret_val = do_gets ((void *) (intptr_t) port);
	if (! ret_val)
	stop (test_desc);
	MHD_stop_daemon (d);
	if (ret_val)
	{
	fprintf (stderr,
	"Error performing %s test: %s\n", test_desc, ret_val);
	return 4;
	}
	return 0;
	}


	static unsigned int
	testMultithreadedPoolGet (uint16_t port, uint32_t poll_flag)
	{
	struct MHD_Daemon *d;
	const char *const test_desc = ((poll_flag & MHD_USE_AUTO) ?
	"internal thread pool with 'auto'" :
	(poll_flag & MHD_USE_POLL) ?
	"internal thread pool with poll()" :
	(poll_flag & MHD_USE_EPOLL) ?
	"internal thread poll with epoll" :
	"internal thread pool with select()");
	const char *ret_val;

	if (MHD_NO != MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT))
	port = 0;

	signal_done = 0;
	d = MHD_start_daemon (MHD_USE_INTERNAL_POLLING_THREAD \| MHD_USE_ERROR_LOG
	\| (enum MHD_FLAG) poll_flag,
	port, NULL, NULL, &ahc_echo, NULL,
	MHD_OPTION_THREAD_POOL_SIZE, MHD_CPU_COUNT,
	MHD_OPTION_END);
	if (d == NULL)
	return 16;
	if (0 == port)
	{
	const union MHD_DaemonInfo *dinfo;
	dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
	if ((NULL == dinfo) \|\| (0 == dinfo->port) )
	{
	MHD_stop_daemon (d); return 32;
	}
	port = dinfo->port;
	}
	start_timer ();
	ret_val = do_gets ((void *) (intptr_t) port);
	if (! ret_val)
	stop (test_desc);
	MHD_stop_daemon (d);
	if (ret_val)
	{
	fprintf (stderr,
	"Error performing %s test: %s\n", test_desc, ret_val);
	return 4;
	}
	return 0;
	}


	static unsigned int
	testExternalGet (uint16_t port)
	{
	struct MHD_Daemon *d;
	pthread_t pid;
	fd_set rs;
	fd_set ws;
	fd_set es;
	MHD_socket max;
	struct timeval tv;
	uint64_t tt64;
	int tret;
	char *ret_val;
	int ret = 0;

	if (MHD_NO != MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT))
	port = 0;

	signal_done = 0;
	d = MHD_start_daemon (MHD_USE_ERROR_LOG,
	port, NULL, NULL, &ahc_echo, NULL, MHD_OPTION_END);
	if (d == NULL)
	return 256;
	if (0 == port)
	{
	const union MHD_DaemonInfo *dinfo;
	dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
	if ((NULL == dinfo) \|\| (0 == dinfo->port) )
	{
	MHD_stop_daemon (d); return 32;
	}
	port = dinfo->port;
	}
	if (0 != pthread_create (&pid, NULL,
	&do_gets, (void *) (intptr_t) port))
	{
	MHD_stop_daemon (d);
	return 512;
	}
	start_timer ();

	while (0 == signal_done)
	{
	max = 0;
	FD_ZERO (&rs);
	FD_ZERO (&ws);
	FD_ZERO (&es);
	if (MHD_YES != MHD_get_fdset (d, &rs, &ws, &es, &max))
	{
	MHD_stop_daemon (d);
	return 4096;
	}
	tret = MHD_get_timeout64 (d, &tt64);
	if (MHD_YES != tret)
	tt64 = 1;
	#if ! defined(_WIN32) \|\| defined(__CYGWIN__)
	tv.tv_sec = (time_t) (tt64 / 1000);
	#else /* Native W32 */
	tv.tv_sec = (long) (tt64 / 1000);
	#endif /* Native W32 */
	tv.tv_usec = ((long) (tt64 % 1000)) * 1000;
	if (-1 == select (max + 1, &rs, &ws, &es, &tv))
	{
	#ifdef MHD_POSIX_SOCKETS
	if (EINTR != errno)
	{
	fprintf (stderr, "Unexpected select() error: %d. Line: %d\n",
	(int) errno, __LINE__);
	fflush (stderr);
	exit (99);
	}
	ret \|= 1024;
	break;
	#else
	if ((WSAEINVAL != WSAGetLastError ()) \|\|
	(0 != rs.fd_count) \|\| (0 != ws.fd_count) \|\| (0 != es.fd_count) )
	{
	fprintf (stderr, "Unexpected select() error: %d. Line: %d\n",
	(int) WSAGetLastError (), __LINE__);
	fflush (stderr);
	exit (99);
	}
	Sleep (1);
	#endif
	}
	MHD_run_from_select (d, &rs, &ws, &es);
	}

	stop ("external select");
	MHD_stop_daemon (d);
	if ((0 != pthread_join (pid, (void **) &ret_val)) \|\|
	(NULL != ret_val) )
	{
	fprintf (stderr,
	"%s\n", ret_val);
	ret \|= 8;
	}
	if (ret)
	fprintf (stderr, "Error performing test.\n");
	return 0;
	}


	int
	main (int argc, char const argv)
	{
	unsigned int errorCount = 0;
	uint16_t port = 1100;
	(void) argc; /* Unused. Silent compiler warning. */

	if ((NULL == argv) \|\| (0 == argv[0]))
	return 99;
	oneone = has_in_name (argv[0], "11");
	if (oneone)
	port += 15;
	if (0 != curl_global_init (CURL_GLOBAL_WIN32))
	return 2;
	response = MHD_create_response_from_buffer_copy (strlen ("/hello_world"),
	"/hello_world");
	errorCount += testInternalGet (port++, 0);
	errorCount += testMultithreadedGet (port++, 0);
	errorCount += testMultithreadedPoolGet (port++, 0);
	errorCount += testExternalGet (port++);
	errorCount += testInternalGet (port++, MHD_USE_AUTO);
	errorCount += testMultithreadedGet (port++, MHD_USE_AUTO);
	errorCount += testMultithreadedPoolGet (port++, MHD_USE_AUTO);
	if (MHD_YES == MHD_is_feature_supported (MHD_FEATURE_POLL))
	{
	errorCount += testInternalGet (port++, MHD_USE_POLL);
	errorCount += testMultithreadedGet (port++, MHD_USE_POLL);
	errorCount += testMultithreadedPoolGet (port++, MHD_USE_POLL);
	}
	if (MHD_YES == MHD_is_feature_supported (MHD_FEATURE_EPOLL))
	{
	errorCount += testInternalGet (port++, MHD_USE_EPOLL);
	errorCount += testMultithreadedPoolGet (port++, MHD_USE_EPOLL);
	}
	MHD_destroy_response (response);
	if (errorCount != 0)
	fprintf (stderr, "Error (code: %u)\n", errorCount);
	curl_global_cleanup ();
	return errorCount != 0; /* 0 == pass */
	}