1 files changed, 89 insertions, 0 deletions
diff --git a/src/kash/shthread.h b/src/kash/shthread.h
new file mode 100644
index 0000000..046cee3
--- /dev/null
+++ b/src/kash/shthread.h
@@ -0,0 +1,89 @@
+/* $Id: shthread.h 3515 2021-12-16 12:54:03Z bird $ */
+/** @file
+ *
+ * Shell thread methods.
+ *
+ * Copyright (c) 2007-2010 knut st. osmundsen <bird-kBuild-spamx@anduin.net>
+ *
+ *
+ * This file is part of kBuild.
+ *
+ * kBuild is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * kBuild is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with kBuild; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#ifndef ___shthread_h___
+#define ___shthread_h___
+
+#include "shtypes.h"
+
+typedef union shmtx
+{
+    char b[64];
+    KU64 au64[64/sizeof(KU64)];
+    void *aptrs[64/sizeof(void *)];
+} shmtx;
+
+/** Magic mutex value (final u64).
+ * This is used to detect whether the mutex has been initialized or not,
+ * allowing shmtx_delete to be called more than once without doing harm.
+ * @internal */
+#define SHMTX_MAGIC        KU64_C(0x8888000019641018) /**< Charles Stross */
+/** Index into shmtx::au64 of the SHMTX_MAGIC value.
+ * @internal */
+#define SHMTX_MAGIC_IDX    (sizeof(shmtx) / sizeof(KU64) - 1)
+
+typedef struct shmtxtmp { int i; } shmtxtmp;
+
+typedef uintptr_t shtid;
+
+void shthread_set_shell(struct shinstance *);
+struct shinstance *shthread_get_shell(void);
+void shthread_set_name(const char *name);
+
+int shmtx_init(shmtx *pmtx);
+void shmtx_delete(shmtx *pmtx);
+void shmtx_enter(shmtx *pmtx, shmtxtmp *ptmp);
+void shmtx_leave(shmtx *pmtx, shmtxtmp *ptmp);
+
+
+K_INLINE unsigned sh_atomic_inc(KU32 volatile *valuep)
+{
+#ifdef _MSC_VER
+    return _InterlockedIncrement((long *)valuep);
+#elif defined(__GNUC__) && (K_ARCH == K_ARCH_AMD64 || K_ARCH == K_ARCH_X86_32)
+    unsigned uRet;
+    __asm__ __volatile__("lock; xaddl %1, %0" : "=m" (*valuep), "=r" (uRet) : "m" (*valuep), "1" (1) : "memory", "cc");
+    return uRet + 1;
+#else
+    return __sync_add_and_fetch(valuep, 1);
+#endif
+}
+
+K_INLINE unsigned sh_atomic_dec(unsigned volatile *valuep)
+{
+#ifdef _MSC_VER
+    return _InterlockedDecrement((long *)valuep);
+#elif defined(__GNUC__) && (K_ARCH == K_ARCH_AMD64 || K_ARCH == K_ARCH_X86_32)
+    unsigned uRet;
+    __asm__ __volatile__("lock; xaddl %1, %0" : "=m" (*valuep), "=r" (uRet) : "m" (*valuep), "1" (-1) : "memory", "cc");
+    return uRet - 1;
+#else
+    return __sync_sub_and_fetch(valuep, 1);
+#endif
+}
+
+#endif
+