From 14cb83d0d70aa33135090aed2d6b750f69e189f3 Mon Sep 17 00:00:00 2001
From: Claudius Holeksa <mail@keldu.de>
Date: Sun, 14 May 2023 12:46:49 +0200
Subject: c++: Fixing error handling in old source

---
 src/io/io.h        |  5 +++++
 src/io/io_unix.cpp | 23 +++++++++++------------
 2 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/src/io/io.h b/src/io/io.h
index bcc59fd..b2792dd 100644
--- a/src/io/io.h
+++ b/src/io/io.h
@@ -16,6 +16,11 @@ struct disconnected {
 	static constexpr std::string_view description = "Disconnected";
 	static constexpr bool is_critical = true;
 };
+
+struct resource_busy {
+	static constexpr std::string_view description = "Resource busy";
+	static constexpr bool is_critical = false;
+};
 }
 /*
  * Input stream
diff --git a/src/io/io_unix.cpp b/src/io/io_unix.cpp
index b5f17e5..e59fa66 100644
--- a/src/io/io_unix.cpp
+++ b/src/io/io_unix.cpp
@@ -496,10 +496,10 @@ error_or<size_t> unix_io_stream::read(void *buffer, size_t length) {
 	if (read_bytes > 0) {
 		return static_cast<size_t>(read_bytes);
 	} else if (read_bytes == 0) {
-		return critical_error("Disconnected", error::code::Disconnected);
+		return make_error<err::disconnected>();
 	}
 
-	return recoverable_error("Currently busy");
+	return make_error<err::resource_busy>();
 }
 
 conveyor<void> unix_io_stream::read_ready() {
@@ -523,10 +523,10 @@ error_or<size_t> unix_io_stream::write(const void *buffer, size_t length) {
 	int error = errno;
 
 	if (error == EAGAIN || error == EWOULDBLOCK) {
-		return recoverable_error("Currently busy");
+		return make_error<err::resource_busy>();
 	}
 
-	return critical_error("Disconnected", error::code::Disconnected);
+	return make_error<err::disconnected>();
 }
 
 conveyor<void> unix_io_stream::write_ready() {
@@ -609,7 +609,7 @@ error_or<size_t> unix_datagram::read(void *buffer, size_t length) {
 	if (read_bytes > 0) {
 		return static_cast<size_t>(read_bytes);
 	}
-	return recoverable_error("Currently busy");
+	return make_error<err::resource_busy>();
 }
 
 conveyor<void> unix_datagram::read_ready() {
@@ -628,7 +628,7 @@ error_or<size_t> unix_datagram::write(const void *buffer, size_t length,
 	if (write_bytes > 0) {
 		return static_cast<size_t>(write_bytes);
 	}
-	return recoverable_error("Currently busy");
+	return make_error<err::resource_busy>();
 }
 
 conveyor<void> unix_datagram::write_ready() {
@@ -742,12 +742,12 @@ conveyor<own<io_stream>> unix_network::connect(network_address &addr) {
 
 	assert(address.unix_address_size() > 0);
 	if (address.unix_address_size() == 0) {
-		return conveyor<own<io_stream>>{critical_error("No address found")};
+		return conveyor<own<io_stream>>{make_error<err::critical>()};
 	}
 
 	int fd = address.unix_address(0).socket(SOCK_STREAM);
 	if (fd < 0) {
-		return conveyor<own<io_stream>>{critical_error("Couldn't open socket")};
+		return conveyor<own<io_stream>>{make_error<err::disconnected>()};
 	}
 
 	own<unix_io_stream> io_str =
@@ -780,8 +780,7 @@ conveyor<own<io_stream>> unix_network::connect(network_address &addr) {
 				break;
 			} else if (error != EINTR) {
 				/// @todo Push error message from
-				return conveyor<own<io_stream>>{
-					critical_error("Couldn't connect")};
+				return conveyor<own<io_stream>>{make_error<err::disconnected>()};
 			}
 		} else {
 			success = true;
@@ -790,7 +789,7 @@ conveyor<own<io_stream>> unix_network::connect(network_address &addr) {
 	}
 
 	if (!success) {
-		return critical_error("Couldn't connect");
+		return conveyor<own<io_stream>>{make_error<err::disconnected>()};
 	}
 
 	return conveyor<own<io_stream>>{std::move(io_str)};
@@ -888,7 +887,7 @@ error_or<async_io_context> setup_async_io() {
 
 		return {{std::move(io_provider), loop_ref, prt_ref}};
 	} catch (std::bad_alloc &) {
-		return critical_error("Out of memory");
+		return make_error<err::out_of_memory>();
 	}
 }
 } // namespace saw
-- 
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