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Add syscall eventfd and eventfd2

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This commit is contained in:
Jianfeng Jiang
2023-12-04 07:21:31 +00:00
committed by Tate, Hongliang Tian
parent ccc4e6ec6b
commit 078f9a8891
12 changed files with 378 additions and 19 deletions
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5
regression/apps/eventfd2/Makefile Normal file
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# SPDX-License-Identifier: MPL-2.0
include ../test_common.mk
EXTRA_C_FLAGS :=

55
regression/apps/eventfd2/eventfd2.c Normal file
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// SPDX-License-Identifier: MPL-2.0
#include <err.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/eventfd.h>
#include <unistd.h>
int main()
{
int efd;
uint64_t u;
ssize_t s;
uint64_t values[] = { 11, 222, 3333 };
size_t length = sizeof(values) / sizeof(values[0]);
efd = eventfd(0, 0);
if (efd == -1)
err(EXIT_FAILURE, "eventfd");
switch (fork()) {
case 0:
for (size_t j = 0; j < length; j++) {
printf("Child writing %ld to efd\n", values[j]);
u = values[j]; /* strtoull() allows various bases */
s = write(efd, &u, sizeof(uint64_t));
if (s != sizeof(uint64_t))
err(EXIT_FAILURE, "write");
}
printf("Child completed write loop\n");
exit(EXIT_SUCCESS);
default:
sleep(2);
printf("Parent about to read\n");
s = read(efd, &u, sizeof(uint64_t));
if (s != sizeof(uint64_t))
err(EXIT_FAILURE, "read");
printf("Parent read %" PRIu64 " (%#" PRIx64 ") from efd\n", u,
u);
if (u != 11 + 222 + 3333) {
err(EXIT_FAILURE, "read eventfd");
exit(EXIT_FAILURE);
}
exit(EXIT_SUCCESS);
case -1:
err(EXIT_FAILURE, "fork");
}
}