From 227118866190a7fe17b42e8c589c475781c69f33 Mon Sep 17 00:00:00 2001
From: Yuqian Yang <crupest@crupest.life>
Date: Fri, 5 Sep 2025 23:52:33 +0800
Subject: Event loop poll.

---
 src/base/platform/unix/UnixFile.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'src/base/platform/unix/UnixFile.cpp')

diff --git a/src/base/platform/unix/UnixFile.cpp b/src/base/platform/unix/UnixFile.cpp
index 6d2dea89..9d4db949 100644
--- a/src/base/platform/unix/UnixFile.cpp
+++ b/src/base/platform/unix/UnixFile.cpp
@@ -96,6 +96,19 @@ ssize_t UnixFileDescriptor::Read(void* buffer, size_t size) {
   return result;
 }
 
+ssize_t UnixFileDescriptor::Write(const void* buffer, size_t size) {
+  EnsureValid();
+  auto result = ::write(GetValue(), buffer, size);
+  if (result == -1) {
+    if (errno == EAGAIN || errno == EWOULDBLOCK) {
+      return -1;
+    } else {
+      throw ErrnoException("Failed to write on file descriptor.");
+    }
+  }
+  return result;
+}
+
 void UnixFileDescriptor::SetFileDescriptorFlags(int flags) {
   EnsureValid();
   if (::fcntl(GetValue(), F_SETFL, flags) == -1) {
-- 
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