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https://github.com/aljazceru/lightning.git
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888389e625
We need the following additional modules for the daemon: io, time, timer, pipecmd Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
#include <ccan/io/io.h>
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#include <ccan/time/time.h>
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#include <sys/wait.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <err.h>
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#include <signal.h>
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#define NUM 500
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#define NUM_ITERS 10000
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struct buffer {
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int iters;
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struct io_conn *reader, *writer;
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char buf[32];
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};
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static struct io_plan poke_reader(struct io_conn *conn, struct buffer *buf);
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static struct io_plan poke_writer(struct io_conn *conn, struct buffer *buf)
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{
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assert(conn == buf->reader);
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if (buf->iters == NUM_ITERS)
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return io_close();
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/* You write. */
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io_wake(buf->writer,
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io_write(&buf->buf, sizeof(buf->buf), poke_reader, buf));
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/* I'll wait until you wake me. */
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return io_idle();
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}
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static struct io_plan poke_reader(struct io_conn *conn, struct buffer *buf)
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{
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assert(conn == buf->writer);
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/* You read. */
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io_wake(buf->reader,
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io_read(&buf->buf, sizeof(buf->buf), poke_writer, buf));
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if (++buf->iters == NUM_ITERS)
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return io_close();
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/* I'll wait until you tell me to write. */
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return io_idle();
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}
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int main(void)
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{
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unsigned int i;
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int fds[2], last_read, last_write;
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struct timespec start, end;
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struct buffer buf[NUM];
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if (pipe(fds) != 0)
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err(1, "pipe");
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last_read = fds[0];
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last_write = fds[1];
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for (i = 1; i < NUM; i++) {
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buf[i].iters = 0;
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if (pipe(fds) < 0)
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err(1, "pipe");
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memset(buf[i].buf, i, sizeof(buf[i].buf));
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sprintf(buf[i].buf, "%i-%i", i, i);
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buf[i].reader = io_new_conn(last_read, io_idle());
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if (!buf[i].reader)
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err(1, "Creating reader %i", i);
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buf[i].writer = io_new_conn(fds[1],
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io_write(&buf[i].buf,
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sizeof(buf[i].buf),
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poke_reader, &buf[i]));
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if (!buf[i].writer)
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err(1, "Creating writer %i", i);
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last_read = fds[0];
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}
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/* Last one completes the cirle. */
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i = 0;
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buf[i].iters = 0;
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sprintf(buf[i].buf, "%i-%i", i, i);
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buf[i].reader = io_new_conn(last_read, io_idle());
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if (!buf[i].reader)
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err(1, "Creating reader %i", i);
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buf[i].writer = io_new_conn(last_write, io_write(&buf[i].buf,
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sizeof(buf[i].buf),
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poke_reader, &buf[i]));
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if (!buf[i].writer)
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err(1, "Creating writer %i", i);
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/* They should eventually exit */
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start = time_now();
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if (io_loop() != NULL)
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errx(1, "io_loop?");
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end = time_now();
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for (i = 0; i < NUM; i++) {
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char b[sizeof(buf[0].buf)];
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memset(b, i, sizeof(b));
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sprintf(b, "%i-%i", i, i);
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if (memcmp(b, buf[(i + NUM_ITERS) % NUM].buf, sizeof(b)) != 0)
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errx(1, "Buffer for %i was '%s' not '%s'",
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i, buf[(i + NUM_ITERS) % NUM].buf, b);
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}
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printf("run-many: %u %u iterations: %llu usec\n",
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NUM, NUM_ITERS, (long long)time_to_usec(time_sub(end, start)));
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return 0;
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}
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