ubifs-utils: Add spinlock implementations

Add spinlock implementations, because there are some spinlocks
(eg. c->cnt_lock, c->buds_lock) used in UBIFS linux kernel libs.
The spinlock is implemented based on pthread mutex.

This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.

Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

diff --git a/ubifs-utils/Makemodule.am b/ubifs-utils/Makemodule.am
index 9e075071d6d0270784fe4391067f56192badbe05..7849114e08a55920924971eb41af3b74c67f41d3 100644 (file)
--- a/ubifs-utils/Makemodule.am
+++ b/ubifs-utils/Makemodule.am
@@ -5,6 +5,7 @@ common_SOURCES = \
        ubifs-utils/common/atomic.h \
        ubifs-utils/common/bitops.h \
        ubifs-utils/common/bitops.c \
+       ubifs-utils/common/spinlock.h \
        ubifs-utils/common/kmem.h \
        ubifs-utils/common/kmem.c \
        ubifs-utils/common/defs.h \
@@ -39,7 +40,7 @@ mkfs_ubifs_SOURCES = \
        $(common_SOURCES) \
        ubifs-utils/mkfs.ubifs/mkfs.ubifs.c
 
-mkfs_ubifs_LDADD = libmtd.a libubi.a $(ZLIB_LIBS) $(LZO_LIBS) $(ZSTD_LIBS) $(UUID_LIBS) $(LIBSELINUX_LIBS) $(OPENSSL_LIBS) -lm
+mkfs_ubifs_LDADD = libmtd.a libubi.a $(ZLIB_LIBS) $(LZO_LIBS) $(ZSTD_LIBS) $(UUID_LIBS) $(LIBSELINUX_LIBS) $(OPENSSL_LIBS) -lm -lpthread
 mkfs_ubifs_CPPFLAGS = $(AM_CPPFLAGS) $(ZLIB_CFLAGS) $(LZO_CFLAGS) $(ZSTD_CFLAGS) $(UUID_CFLAGS) $(LIBSELINUX_CFLAGS) \
        -I$(top_srcdir)/ubi-utils/include -I$(top_srcdir)/ubifs-utils/common
 

diff --git a/ubifs-utils/common/spinlock.h b/ubifs-utils/common/spinlock.h
new file mode 100644 (file)
index 0000000..b9ed393
--- /dev/null
+++ b/ubifs-utils/common/spinlock.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_SPINLOCK_H_
+#define __LINUX_SPINLOCK_H_
+
+#include <pthread.h>
+
+#define spinlock_t             pthread_mutex_t
+#define DEFINE_SPINLOCK(x)     pthread_mutex_t x = PTHREAD_MUTEX_INITIALIZER
+#define spin_lock_init(x)      pthread_mutex_init(x, NULL)
+
+#define spin_lock(x)           pthread_mutex_lock(x)
+#define spin_unlock(x)         pthread_mutex_unlock(x)
+
+#endif