1 files changed, 86 insertions, 0 deletions
diff --git a/src/nxt_dyld.c b/src/nxt_dyld.c
new file mode 100644
index 00000000..63e6be14
--- /dev/null
+++ b/src/nxt_dyld.c
@@ -0,0 +1,86 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#include <nxt_main.h>
+
+
+nxt_int_t
+nxt_dyld_load(nxt_dyld_t *dyld)
+{
+    const char  *err;
+
+    dyld->handle = dlopen(dyld->name, RTLD_NOW | RTLD_GLOBAL);
+
+    if (dyld->handle != NULL) {
+        nxt_thread_log_debug("dlopen(\"%s\")", dyld->name);
+        return NXT_OK;
+    }
+
+    err = dlerror();
+    if (err == NULL) {
+        err = "(null)";
+    }
+
+    nxt_thread_log_alert("dlopen(\"%s\") failed: %s", dyld->name, err);
+
+    return NXT_ERROR;
+}
+
+
+void *
+nxt_dyld_symbol(nxt_dyld_t *dyld, const char *symbol)
+{
+    void        *handle, *s;
+    const char  *name;
+    const char  *err;
+
+    if (dyld == NXT_DYLD_ANY) {
+        handle = RTLD_DEFAULT;
+        name = "RTLD_DEFAULT";
+
+    } else {
+        handle = dyld->handle;
+        name = dyld->name;
+    }
+
+    s = dlsym(handle, symbol);
+
+    if (s != NULL) {
+        nxt_thread_log_debug("dlsym(\"%s\", \"%s\")", name, symbol);
+        return s;
+    }
+
+    err = dlerror();
+    if (err == NULL) {
+        err = "(null)";
+    }
+
+    nxt_thread_log_alert("dlsym(\"%s\", \"%s\") failed: %s", name, symbol, err);
+
+    return s;
+}
+
+
+nxt_int_t
+nxt_dyld_unload(nxt_dyld_t *dyld)
+{
+    const char  *err;
+
+    if (dlclose(dyld->handle) == 0) {
+        nxt_thread_log_debug("dlclose(\"%s\")", dyld->name);
+        return NXT_OK;
+    }
+
+    err = dlerror();
+
+    if (err == NULL) {
+        err = "(null)";
+    }
+
+    nxt_thread_log_alert("dlclose(\"%s\") failed: %s", dyld->name, err);
+
+    return NXT_ERROR;
+}