compat: Adds more platform compatibility headers and mem compatibility.

- Adds compatibility headers that provides functionality missing from
Windows headers and cross-platform compatibility macros.
- Adds memory management compatibility for aligned memory allocation
and freeing.  Windows has a seprate aligned free that needs to be used
for aligned memory.

Signed-off-by: Broc Going <[email protected]>
Signed-off-by: Brandon Capener <[email protected]>

Author: bgoing-micron-oss

common.h

@@ -9,8 +9,12 @@
 
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
 
+#ifndef min
 #define min(x, y) ((x) > (y) ? (y) : (x))
+#endif
+#ifndef max
 #define max(x, y) ((x) > (y) ? (x) : (y))
+#endif
 
 #ifdef __packed
 #else /* __packed */

libnvme/src/meson.build

@@ -32,10 +32,16 @@ headers = [
     'nvme/lib-types.h',
     'nvme/lib.h',
     'nvme/linux.h',
+    'nvme/malloc.h',
+    'nvme/mkdir.h',
     'nvme/nvme-cmds.h',
     'nvme/nvme-types.h',
+    'nvme/signal.h',
+    'nvme/stdio.h',
+    'nvme/stdlib.h',
     'nvme/tree.h',
     'nvme/types.h',
+    'nvme/unistd.h',
     'nvme/util.h',
 ]
 

libnvme/src/nvme/cleanup.h

@@ -2,7 +2,7 @@
 #ifndef __CLEANUP_H
 #define __CLEANUP_H
 
-#include <stdlib.h>
+#include <nvme/stdlib.h>
 
 #define __cleanup(fn) __attribute__((cleanup(fn)))
 
@@ -22,4 +22,10 @@ static inline void freep(void *p)
 }
 #define __cleanup_free __cleanup(freep)
 
+static inline void libnvme_freep(void *p)
+{
+	aligned_free(*(void **)p);
+}
+#define __cleanup_libnvme_free __cleanup(libnvme_freep)
+
 #endif

libnvme/src/nvme/fabrics.c

@@ -1418,7 +1418,7 @@ static int nvme_discovery_log(libnvme_ctrl_t ctrl,
 		if (numrec == 0)
 			break;
 
-		free(log);
+		__libnvme_free(log);
 		entries_size = sizeof(*log->entries) * numrec;
 		log = __libnvme_alloc(sizeof(*log) + entries_size);
 		if (!log) {
@@ -1475,7 +1475,7 @@ static int nvme_discovery_log(libnvme_ctrl_t ctrl,
 	}
 
 out_free_log:
-	free(log);
+	__libnvme_free(log);
 	return err;
 }
 

libnvme/src/nvme/lib.h

@@ -12,6 +12,8 @@
 #include <stdio.h>
 
 #include <nvme/lib-types.h>
+#include <nvme/stdlib.h>
+#include <nvme/unistd.h>
 
 enum libnvme_log_level {
 	LIBNVME_LOG_ERR	  = 0,

libnvme/src/nvme/log.c

@@ -10,10 +10,11 @@
 
 #include <stdarg.h>
 #include <stdbool.h>
-#include <stdio.h>
 #include <time.h>
 #include <unistd.h>
 
+#include <nvme/stdio.h>
+
 #include <libnvme.h>
 
 #include "cleanup.h"

libnvme/src/nvme/malloc.h

@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * This file is part of libnvme.
+ * Copyright (c) 2026 Micron Technology, Inc.
+ *
+ * Cross-platform compatibility for malloc.h.
+ * Provides functionality that may be missing on some platforms.
+ * Compatibility is not comprehensive. Only functionality required by
+ * nvme-cli and libnvme is included.
+ *
+ * Authors: Brandon Capener <[email protected]>
+ */
+#pragma once
+
+#include <malloc.h>
+
+#if defined(_WIN32)
+#define malloc_usable_size _msize
+#endif

libnvme/src/nvme/mkdir.h

@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * This file is part of libnvme.
+ * Copyright (c) 2026 Micron Technology, Inc.
+ *
+ * Cross-platform compatibility for mkdir (sys/stat.h).
+ *
+ * Authors: Brandon Busacker <[email protected]>
+ */
+#pragma once
+
+#if defined(_WIN32)
+
+#include <direct.h>
+
+/* Windows mkdir doesn't take the mode parameter */
+#define mkdir(path, mode) _mkdir(path)
+
+#endif

libnvme/src/nvme/private.h

@@ -425,6 +425,8 @@ bool _libnvme_ctrl_match_config(struct libnvme_ctrl *c,
 
 void *__libnvme_alloc(size_t len);
 
+void __libnvme_free(void *p);
+
 void *__libnvme_realloc(void *p, size_t len);
 
 void nvme_deconfigure_ctrl(struct libnvme_ctrl *c);

libnvme/src/nvme/signal.h

@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * This file is part of libnvme.
+ * Copyright (c) 2026 Micron Technology, Inc.
+ *
+ * Cross-platform compatibility for signal.h.
+ * Provides functionality that may be missing on some platforms.
+ * Compatibility is not comprehensive. Only functionality required by
+ * nvme-cli and libnvme is included.
+ *
+ * Authors: Brandon Busacker <[email protected]>
+ */
+#pragma once
+
+#include <signal.h>
+
+#if defined(_WIN32)
+
+/* signal.h POSIX compatibility - Windows doesn't have sigaction */
+
+struct sigaction {
+	void (*sa_handler)(int);
+	int sa_flags;
+	int sa_mask;  /* simplified - normally sigset_t */
+};
+
+static inline int sigemptyset(int *set)
+{
+	*set = 0;
+	return 0;
+}
+
+/*
+ * Simplified signal handling using Windows signal() function
+ * This is sufficient for handling SIGINT with no mask or flags.
+ */
+static inline int sigaction(int signum, const struct sigaction *act,
+			struct sigaction *oldact)
+{
+	(void)oldact; /* ignore old action for simplicity */
+	if (act && act->sa_handler) {
+		signal(signum, act->sa_handler);
+		return 0;
+	}
+	return -1;
+}
+
+#endif