Initial version.

src/nxt_malloc.c

@@ -0,0 +1,210 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#include <nxt_main.h>
+
+
+static nxt_log_moderation_t  nxt_malloc_log_moderation = {
+    NXT_LOG_ALERT, 2, "memory allocation failed", NXT_LOG_MODERATION
+};
+
+
+static nxt_log_t *
+nxt_malloc_log(void)
+{
+    nxt_thread_t  *thr;
+
+    thr = nxt_thread();
+
+    if (thr != NULL && thr->log != NULL) {
+        return thr->log;
+    }
+
+    return &nxt_main_log;
+}
+
+
+void *
+nxt_malloc(size_t size)
+{
+    void  *p;
+
+    p = malloc(size);
+
+    if (nxt_fast_path(p != NULL)) {
+        nxt_log_debug(nxt_malloc_log(), "malloc(%uz): %p", size, p);
+
+    } else {
+        nxt_log_moderate(&nxt_malloc_log_moderation,
+                         NXT_LOG_ALERT, nxt_malloc_log(),
+                         "malloc(%uz) failed %E", size, nxt_errno);
+    }
+
+    return p;
+}
+
+
+void *
+nxt_zalloc(size_t size)
+{
+    void  *p;
+
+    p = nxt_malloc(size);
+
+    if (nxt_fast_path(p != NULL)) {
+        nxt_memzero(p, size);
+    }
+
+    return p;
+}
+
+
+void *
+nxt_realloc(void *p, size_t size)
+{
+    void  *n;
+
+    n = realloc(p, size);
+
+    if (nxt_fast_path(n != NULL)) {
+        nxt_log_debug(nxt_malloc_log(), "realloc(%p, %uz): %p", p, size, n);
+
+    } else {
+        nxt_log_moderate(&nxt_malloc_log_moderation,
+                         NXT_LOG_ALERT, nxt_malloc_log(),
+                         "realloc(%p, %uz) failed %E", p, size, nxt_errno);
+    }
+
+    return n;
+}
+
+
+#if (NXT_DEBUG)
+
+void
+nxt_free(void *p)
+{
+    nxt_log_debug(nxt_malloc_log(), "free(%p)", p);
+
+    free(p);
+}
+
+
+#endif
+
+
+#if (NXT_HAVE_POSIX_MEMALIGN)
+
+/*
+ * posix_memalign() presents in Linux glibc 2.1.91, FreeBSD 7.0,
+ * Solaris 11, MacOSX 10.6 (Snow Leopard), NetBSD 5.0.
+ */
+
+void *
+nxt_memalign(size_t alignment, size_t size)
+{
+    void        *p;
+    nxt_err_t   err;
+
+    err = posix_memalign(&p, alignment, size);
+
+    if (nxt_fast_path(err == 0)) {
+        nxt_thread_log_debug("posix_memalign(%uz, %uz): %p",
+                             alignment, size, p);
+        return p;
+    }
+
+    nxt_log_moderate(&nxt_malloc_log_moderation,
+                     NXT_LOG_ALERT, nxt_malloc_log(),
+                     "posix_memalign(%uz, %uz) failed %E",
+                     alignment, size, err);
+    return NULL;
+}
+
+#elif (NXT_HAVE_MEMALIGN)
+
+/* memalign() presents in Solaris, HP-UX. */
+
+void *
+nxt_memalign(size_t alignment, size_t size)
+{
+    void  *p;
+
+    p = memalign(alignment, size);
+
+    if (nxt_fast_path(p != NULL)) {
+        nxt_thread_log_debug("memalign(%uz, %uz): %p",
+                             alignment, size, p);
+        return p;
+    }
+
+    nxt_log_moderate(&nxt_malloc_log_moderation,
+                     NXT_LOG_ALERT, nxt_malloc_log(),
+                     "memalign(%uz, %uz) failed %E",
+                     alignment, size, nxt_errno);
+    return NULL;
+}
+
+#elif (NXT_FREEBSD)
+
+/*
+ * FreeBSD prior to 7.0 lacks posix_memalign(), but if a requested size
+ * is lesser than or equal to 4K, then phkmalloc aligns the size to the
+ * next highest power of 2 and allocates memory with the same alignment.
+ * Allocations larger than 2K are always aligned to 4K.
+ */
+
+void *
+nxt_memalign(size_t alignment, size_t size)
+{
+    size_t     aligned_size;
+    u_char     *p;
+    nxt_err_t  err;
+
+    if (nxt_slow_path((alignment - 1) & alignment) != 0) {
+        /* Alignment must be a power of 2. */
+        err = NXT_EINVAL;
+        goto fail;
+    }
+
+    if (nxt_slow_path(alignment > 4096)) {
+        err = NXT_EOPNOTSUPP;
+        goto fail;
+    }
+
+    if (nxt_fast_path(size <= 2048)) {
+        aligned_size = nxt_max(size, alignment);
+
+    } else {
+        /* Align to 4096. */
+        aligned_size = size;
+    }
+
+    p = malloc(aligned_size);
+
+    if (nxt_fast_path(p != NULL)) {
+        nxt_thread_log_debug("nxt_memalign(%uz, %uz): %p", alignment, size, p);
+
+    } else {
+        nxt_log_moderate(&nxt_malloc_log_moderation,
+                         NXT_LOG_ALERT, nxt_malloc_log(),
+                         "malloc(%uz) failed %E", size, nxt_errno);
+    }
+
+    return p;
+
+fail:
+
+    nxt_thread_log_alert("nxt_memalign(%uz, %uz) failed %E",
+                         alignment, size, err);
+    return NULL;
+}
+
+#else
+
+#error no memalign() implementation.
+
+#endif