From 7bf42331fd6e4d06e9ce35f50f25b69c7c669b9c Mon Sep 17 00:00:00 2001
From: lijialiang <lijialiang15@h-partners.com>
Date: Tue, 4 Jun 2024 15:42:13 +0800
Subject: [PATCH] =?UTF-8?q?sync=5Fwait=E4=B8=8A=E5=BA=93?=
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Signed-off-by: lijialiang <lijialiang15@h-partners.com>
---
 sync.h | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 sync.h

diff --git a/sync.h b/sync.h
new file mode 100644
index 0000000..f3d5d5b
--- /dev/null
+++ b/sync.h
@@ -0,0 +1,38 @@
+#ifndef SYNC_H
+#define SYNC_H
+
+#include <stdio.h>
+#include <errno.h>
+#include <poll.h>
+
+static inline int sync_wait(int num, int time)
+{
+    struct pollfd work;
+    int result;
+
+    if (num < 0) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    work.fd = num;
+    work.events = POLLIN;
+
+    do {
+        result = poll(&work, 1, time);
+        if (result > 0) {
+            if (work.revents & (POLLERR | POLLNVAL)) {
+                errno = EINVAL;
+                return -1;
+            }
+            return 0;
+        } else if (result == 0) {
+            errno = ETIME;
+            return -1;
+        }
+    } while (result == -1 && (errno == EINTR || errno == EAGAIN));
+
+    return result;
+}
+
+#endif
\ No newline at end of file
-- 
Gitee