first commit

src/ipc_nix.cpp

@@ -0,0 +1,75 @@
+// Copyright (c) 2023 - present, Anton Anikin <anton@anikin.xyz>
+// All rights reserved.
+
+#include <fcntl.h>
+#include <fmt/core.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "ipc.hpp"
+
+namespace ipc
+{
+
+std::string
+default_name()
+{
+    return fmt::format("/tmp/fifo_ipc_{}", getpid());
+}
+
+void
+make_fifo(const std::string& name, unsigned int mode)
+{
+    if (mkfifo(name.c_str(), mode) < 0)
+    {
+        auto message = fmt::format("mkfifo '{}' : {}", name, strerror(errno));
+        throw std::runtime_error(message);
+    }
+}
+
+void
+init(const std::string& name, unsigned int mode)
+{
+    make_fifo(name + "_s", mode);
+    make_fifo(name + "_c", mode);
+}
+
+Ipc::Ipc(const std::string& name, bool is_server, int verbose)
+    : m_verbose(verbose)
+{
+    auto fifo_open = [](std::string name, int flags) -> int {
+        int fd = open(name.c_str(), flags);
+        if (fd == -1) {
+            auto message = fmt::format("open '{}' : {}", name, strerror(errno));
+            throw std::runtime_error(message);
+        }
+
+        return fd;
+    };
+
+    if (is_server) {
+        m_reader_fd = fifo_open(name + "_c", O_RDONLY);
+        m_writer_fd = fifo_open(name + "_s", O_WRONLY);
+    } else {
+        m_writer_fd = fifo_open(name + "_c", O_WRONLY);
+        m_reader_fd = fifo_open(name + "_s", O_RDONLY);
+    }
+}
+
+Ipc::~Ipc()
+{
+}
+
+ssize_t
+Ipc::_write(const void* buffer, size_t bytes)
+{
+    return ::write(m_writer_fd, buffer, bytes);
+}
+
+ssize_t
+Ipc::_read(void* buffer, size_t bytes)
+{
+    return ::read(m_reader_fd, buffer, bytes);
+}
+
+}