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/*
* libusb multi-thread test program
* Copyright 2022-2023 Tormod Volden
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This program 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include <libusb.h>
#include <stdio.h>
#if defined(PLATFORM_POSIX)
#include <pthread.h>
typedef pthread_t thread_t;
typedef void * thread_return_t;
#define THREAD_RETURN_VALUE NULL
#define THREAD_CALL_TYPE
static inline int thread_create(thread_t *thread,
thread_return_t (*thread_entry)(void *arg), void *arg)
{
return pthread_create(thread, NULL, thread_entry, arg) == 0 ? 0 : -1;
}
static inline void thread_join(thread_t thread)
{
(void)pthread_join(thread, NULL);
}
#elif defined(PLATFORM_WINDOWS)
typedef HANDLE thread_t;
#define THREAD_RETURN_VALUE 0
#define THREAD_CALL_TYPE __stdcall
#if defined(__CYGWIN__)
typedef DWORD thread_return_t;
#else
#include <process.h>
typedef unsigned thread_return_t;
#endif
static inline int thread_create(thread_t *thread,
thread_return_t (__stdcall *thread_entry)(void *arg), void *arg)
{
#if defined(__CYGWIN__)
*thread = CreateThread(NULL, 0, thread_entry, arg, 0, NULL);
#else
*thread = (HANDLE)_beginthreadex(NULL, 0, thread_entry, arg, 0, NULL);
#endif
return *thread != NULL ? 0 : -1;
}
static inline void thread_join(thread_t thread)
{
(void)WaitForSingleObject(thread, INFINITE);
(void)CloseHandle(thread);
}
#endif /* PLATFORM_WINDOWS */
/* Test that creates and destroys contexts repeatedly */
#define NTHREADS 8
#define ITERS 64
static thread_return_t THREAD_CALL_TYPE init_and_exit(void * arg)
{
long int threadno = (long int)(uintptr_t) arg;
printf("Thread %ld started\n", threadno);
for (int i = 0; i < ITERS; ++i) {
libusb_context *ctx = NULL;
int r;
r = libusb_init_context(&ctx, /*options=*/NULL, /*num_options=*/0);
if (r != LIBUSB_SUCCESS) {
printf("Failed to init libusb on iteration %d: %d", i, r);
return (thread_return_t) THREAD_RETURN_VALUE;
}
libusb_exit(ctx);
}
printf("Thread %ld done\n", threadno);
return (thread_return_t) THREAD_RETURN_VALUE;
}
int main(void)
{
thread_t threadId[NTHREADS];
long int t;
printf("Starting multithreaded init and exit test...\n");
for(t = 0; t < NTHREADS; t++)
thread_create(&threadId[t], &init_and_exit, (void *)(uintptr_t) t);
for(t = 0; t < NTHREADS; t++)
thread_join(threadId[t]);
printf("All Done\n");
return 0;
}
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