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Diffstat (limited to '')
| -rw-r--r-- | nsprpub/pr/tests/pollable.c | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/nsprpub/pr/tests/pollable.c b/nsprpub/pr/tests/pollable.c new file mode 100644 index 0000000000..7d0b51cac3 --- /dev/null +++ b/nsprpub/pr/tests/pollable.c @@ -0,0 +1,261 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* + * A test for the pollable events. + * + * A number of threads are in a ring configuration, each waiting on + * a pollable event that is set by its upstream neighbor. + */ + +#include "prinit.h" +#include "prio.h" +#include "prthread.h" +#include "prerror.h" +#include "prmem.h" +#include "prlog.h" +#include "prprf.h" + +#include "plgetopt.h" + +#include <stdlib.h> + +#define DEFAULT_THREADS 10 +#define DEFAULT_LOOPS 100 + +PRIntn numThreads = DEFAULT_THREADS; +PRIntn numIterations = DEFAULT_LOOPS; +PRIntervalTime dally = PR_INTERVAL_NO_WAIT; +PRFileDesc *debug_out = NULL; +PRBool debug_mode = PR_FALSE; +PRBool verbosity = PR_FALSE; + +typedef struct ThreadData { + PRFileDesc *event; + int index; + struct ThreadData *next; +} ThreadData; + +void ThreadRoutine(void *arg) +{ + ThreadData *data = (ThreadData *) arg; + PRIntn i; + PRPollDesc pd; + PRInt32 rv; + + pd.fd = data->event; + pd.in_flags = PR_POLL_READ; + + for (i = 0; i < numIterations; i++) { + rv = PR_Poll(&pd, 1, PR_INTERVAL_NO_TIMEOUT); + if (rv == -1) { + PR_fprintf(PR_STDERR, "PR_Poll failed\n"); + exit(1); + } + if (verbosity) { + PR_fprintf(debug_out, "thread %d awakened\n", data->index); + } + PR_ASSERT(rv != 0); + PR_ASSERT(pd.out_flags & PR_POLL_READ); + if (PR_WaitForPollableEvent(data->event) == PR_FAILURE) { + PR_fprintf(PR_STDERR, "consume event failed\n"); + exit(1); + } + if (dally != PR_INTERVAL_NO_WAIT) { + PR_Sleep(dally); + } + if (verbosity) { + PR_fprintf(debug_out, "thread %d posting event\n", data->index); + } + if (PR_SetPollableEvent(data->next->event) == PR_FAILURE) { + PR_fprintf(PR_STDERR, "post event failed\n"); + exit(1); + } + } +} + +static void Help(void) +{ + debug_out = PR_STDOUT; + + PR_fprintf( + debug_out, "Usage: pollable [-c n] [-t n] [-d] [-v] [-G] [-C n] [-D n]\n"); + PR_fprintf( + debug_out, "-c n\tloops at thread level (default: %d)\n", DEFAULT_LOOPS); + PR_fprintf( + debug_out, "-t n\tnumber of threads (default: %d)\n", DEFAULT_THREADS); + PR_fprintf(debug_out, "-d\tturn on debugging output (default: FALSE)\n"); + PR_fprintf(debug_out, "-v\tturn on verbose output (default: FALSE)\n"); + PR_fprintf(debug_out, "-G\tglobal threads only (default: FALSE)\n"); + PR_fprintf(debug_out, "-C n\tconcurrency setting (default: 1)\n"); + PR_fprintf(debug_out, "-D n\tdally setting (msecs) (default: 0)\n"); +} /* Help */ + +int main(int argc, char **argv) +{ + ThreadData selfData; + ThreadData *data; + PRThread **thread; + void *block; + PRIntn i; + PRIntervalTime timeStart, timeEnd; + PRPollDesc pd; + PRInt32 rv; + PRThreadScope thread_scope = PR_LOCAL_THREAD; + PRBool help = PR_FALSE; + PRUintn concurrency = 1; + PRUintn average; + PLOptStatus os; + PLOptState *opt; + + PR_STDIO_INIT(); + + opt = PL_CreateOptState(argc, argv, "hdvc:t:C:GD:"); + while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) { + if (PL_OPT_BAD == os) { + continue; + } + switch (opt->option) { + case 'v': /* verbose mode */ + verbosity = PR_TRUE; + case 'd': /* debug mode */ + debug_mode = PR_TRUE; + break; + case 'c': /* loop counter */ + numIterations = atoi(opt->value); + break; + case 't': /* thread limit */ + numThreads = atoi(opt->value); + break; + case 'C': /* Concurrency limit */ + concurrency = atoi(opt->value); + break; + case 'G': /* global threads only */ + thread_scope = PR_GLOBAL_THREAD; + break; + case 'D': /* dally */ + dally = PR_MillisecondsToInterval(atoi(opt->value)); + break; + case 'h': /* help message */ + Help(); + help = PR_TRUE; + break; + default: + break; + } + } + PL_DestroyOptState(opt); + + if (help) { + return 1; + } + + if (concurrency > 1) { + PR_SetConcurrency(concurrency); + } + + if (PR_TRUE == debug_mode) { + debug_out = PR_STDOUT; + PR_fprintf(debug_out, "Test parameters\n"); + PR_fprintf(debug_out, "\tThreads involved: %d\n", numThreads); + PR_fprintf(debug_out, "\tIteration limit: %d\n", numIterations); + PR_fprintf(debug_out, "\tConcurrency: %d\n", concurrency); + PR_fprintf(debug_out, "\tThread type: %s\n", + (PR_GLOBAL_THREAD == thread_scope) ? "GLOBAL" : "LOCAL"); + } + + /* + * Malloc a block of memory and divide it into data and thread. + */ + block = PR_MALLOC(numThreads * (sizeof(ThreadData) + sizeof(PRThread *))); + if (block == NULL) { + PR_fprintf(PR_STDERR, "cannot malloc, failed\n"); + exit(1); + } + data = (ThreadData *) block; + thread = (PRThread **) &data[numThreads]; + + /* Pollable event */ + selfData.event = PR_NewPollableEvent(); + if (selfData.event == NULL) { + PR_fprintf(PR_STDERR, "cannot create event: (%ld, %ld)\n", + PR_GetError(), PR_GetOSError()); + exit(1); + } + selfData.next = &data[0]; + for (i = 0; i < numThreads; i++) { + data[i].event = PR_NewPollableEvent(); + if (data[i].event == NULL) { + PR_fprintf(PR_STDERR, "cannot create event: (%ld, %ld)\n", + PR_GetError(), PR_GetOSError()); + exit(1); + } + data[i].index = i; + if (i != numThreads - 1) { + data[i].next = &data[i + 1]; + } else { + data[i].next = &selfData; + } + + thread[i] = PR_CreateThread(PR_USER_THREAD, + ThreadRoutine, &data[i], PR_PRIORITY_NORMAL, + thread_scope, PR_JOINABLE_THREAD, 0); + if (thread[i] == NULL) { + PR_fprintf(PR_STDERR, "cannot create thread\n"); + exit(1); + } + } + + timeStart = PR_IntervalNow(); + pd.fd = selfData.event; + pd.in_flags = PR_POLL_READ; + for (i = 0; i < numIterations; i++) { + if (dally != PR_INTERVAL_NO_WAIT) { + PR_Sleep(dally); + } + if (verbosity) { + PR_fprintf(debug_out, "main thread posting event\n"); + } + if (PR_SetPollableEvent(selfData.next->event) == PR_FAILURE) { + PR_fprintf(PR_STDERR, "set event failed\n"); + exit(1); + } + rv = PR_Poll(&pd, 1, PR_INTERVAL_NO_TIMEOUT); + if (rv == -1) { + PR_fprintf(PR_STDERR, "wait failed\n"); + exit(1); + } + PR_ASSERT(rv != 0); + PR_ASSERT(pd.out_flags & PR_POLL_READ); + if (verbosity) { + PR_fprintf(debug_out, "main thread awakened\n"); + } + if (PR_WaitForPollableEvent(selfData.event) == PR_FAILURE) { + PR_fprintf(PR_STDERR, "consume event failed\n"); + exit(1); + } + } + timeEnd = PR_IntervalNow(); + + if (debug_mode) { + average = PR_IntervalToMicroseconds(timeEnd - timeStart) + / (numIterations * numThreads); + PR_fprintf(debug_out, "Average switch times %d usecs for %d threads\n", + average, numThreads); + } + + for (i = 0; i < numThreads; i++) { + if (PR_JoinThread(thread[i]) == PR_FAILURE) { + PR_fprintf(PR_STDERR, "join thread failed\n"); + exit(1); + } + PR_DestroyPollableEvent(data[i].event); + } + PR_DELETE(block); + PR_DestroyPollableEvent(selfData.event); + + PR_fprintf(PR_STDOUT, "PASSED\n"); + return 0; +} |