first commit

test/test_ipc_c_api.cpp

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+#include <chrono>
+#include <cmath>
+#include <cstdio>
+#include <thread>
+
+#include "ipc/c_api.h"
+
+int
+main(int /* argc */, char** /* argv */)
+{
+    using namespace std::chrono_literals;
+
+    int verbose = 0;
+
+    printf("\n");
+    ipc_init_default(); // default name
+
+    std::thread server_thread([verbose] {
+        printf("[c-server] pre-start\n");
+        std::this_thread::sleep_for(1s);
+
+        auto server = ipc_create_default(1, verbose);
+        printf("[c-server] start\n");
+
+        int value;
+        double result;
+        while(1) {
+            {
+                ipc_read_int(server, &value, 1);
+                printf("[c-server] read int(%d)\n", value);
+            }
+
+            {
+                result = value * value;
+                result = std::sqrt(value);
+                ipc_write_double(server, &result, 1);
+                printf("[c-server] write double(%.2e)\n", result);
+            }
+        }
+    });
+
+    printf("[c-client] pre-start\n");
+    auto client = ipc_create_default(0, verbose);
+    printf("[c-client] start\n");
+
+    double answer;
+    auto hline = "\n------------------------\n";
+    for (int i = 2; i <= 5; ++i) {
+        std::this_thread::sleep_for(500ms);
+        printf(hline);
+
+        {
+            ipc_write_int(client, &i, 1);
+            printf("[c-client] write int(%d)\n", i);
+        }
+
+        {
+            ipc_read_double(client, &answer, 1);
+            printf("[c-client] read double(%.2e)\n", answer);
+        }
+    }
+
+    printf(hline);
+    printf("[c-client] finish the work\n\n");
+
+    return 0;
+}