From a3569f118fd95b7ad41e1a1128e17c0b8928556d Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Sun, 20 Jan 2019 18:30:23 -0800
Subject: [PATCH] Fix libc++ compatibility by renaming atomic_init API

db5 does not build because it is redefining a C++11 standard
library identifier, atomic_init().  Therefore prefix all
its internal defines with '__db_', to avoid collisions.

Upstream-Status: Pending

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 src/dbinc/atomic.h     | 4 ++--
 src/mp/mp_fget.c       | 4 ++--
 src/mp/mp_mvcc.c       | 4 ++--
 src/mp/mp_region.c     | 4 ++--
 src/mutex/mut_method.c | 2 +-
 src/mutex/mut_tas.c    | 4 ++--
 6 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/src/dbinc/atomic.h b/src/dbinc/atomic.h
index 1b49de5..7bf353c 100644
--- a/src/dbinc/atomic.h
+++ b/src/dbinc/atomic.h
@@ -70,7 +70,7 @@ typedef struct {
  * These have no memory barriers; the caller must include them when necessary.
  */
 #define	atomic_read(p)		((p)->value)
-#define	atomic_init(p, val)	((p)->value = (val))
+#define	__db_atomic_init(p, val)	((p)->value = (val))
 
 #ifdef HAVE_ATOMIC_SUPPORT
 
@@ -206,7 +206,7 @@ static inline int __db_atomic_compare_exchange(
 #define	atomic_dec(env, p)	(--(p)->value)
 #define	atomic_compare_exchange(env, p, oldval, newval)		\
 	(DB_ASSERT(env, atomic_read(p) == (oldval)),		\
-	atomic_init(p, (newval)), 1)
+	__db_atomic_init(p, (newval)), 1)
 #else
 #define atomic_inc(env, p)	__atomic_inc(env, p)
 #define atomic_dec(env, p)	__atomic_dec(env, p)
diff --git a/src/mp/mp_fget.c b/src/mp/mp_fget.c
index 16de695..5159520 100644
--- a/src/mp/mp_fget.c
+++ b/src/mp/mp_fget.c
@@ -649,7 +649,7 @@ alloc:		/* Allocate a new buffer header and data space. */
 
 		/* Initialize enough so we can call __memp_bhfree. */
 		alloc_bhp->flags = 0;
-		atomic_init(&alloc_bhp->ref, 1);
+		__db_atomic_init(&alloc_bhp->ref, 1);
 #ifdef DIAGNOSTIC
 		if ((uintptr_t)alloc_bhp->buf & (sizeof(size_t) - 1)) {
 			__db_errx(env, DB_STR("3025",
@@ -955,7 +955,7 @@ alloc:		/* Allocate a new buffer header and data space. */
 			MVCC_MPROTECT(bhp->buf, mfp->pagesize,
 			    PROT_READ);
 
-		atomic_init(&alloc_bhp->ref, 1);
+		__db_atomic_init(&alloc_bhp->ref, 1);
 		MUTEX_LOCK(env, alloc_bhp->mtx_buf);
 		alloc_bhp->priority = bhp->priority;
 		alloc_bhp->pgno = bhp->pgno;
diff --git a/src/mp/mp_mvcc.c b/src/mp/mp_mvcc.c
index 770bad8..dbce4f3 100644
--- a/src/mp/mp_mvcc.c
+++ b/src/mp/mp_mvcc.c
@@ -276,7 +276,7 @@ __memp_bh_freeze(dbmp, infop, hp, bhp, need_frozenp)
 #else
 	memcpy(frozen_bhp, bhp, SSZA(BH, buf));
 #endif
-	atomic_init(&frozen_bhp->ref, 0);
+	__db_atomic_init(&frozen_bhp->ref, 0);
 	if (mutex != MUTEX_INVALID)
 		frozen_bhp->mtx_buf = mutex;
 	else if ((ret = __mutex_alloc(env, MTX_MPOOL_BH,
@@ -428,7 +428,7 @@ __memp_bh_thaw(dbmp, infop, hp, frozen_bhp, alloc_bhp)
 #endif
 		alloc_bhp->mtx_buf = mutex;
 		MUTEX_LOCK(env, alloc_bhp->mtx_buf);
-		atomic_init(&alloc_bhp->ref, 1);
+		__db_atomic_init(&alloc_bhp->ref, 1);
 		F_CLR(alloc_bhp, BH_FROZEN);
 	}
 
diff --git a/src/mp/mp_region.c b/src/mp/mp_region.c
index 4952030..084f499 100644
--- a/src/mp/mp_region.c
+++ b/src/mp/mp_region.c
@@ -245,7 +245,7 @@ __memp_init(env, dbmp, reginfo_off, htab_buckets, max_nreg)
 			     MTX_MPOOL_FILE_BUCKET, 0, &htab[i].mtx_hash)) != 0)
 				return (ret);
 			SH_TAILQ_INIT(&htab[i].hash_bucket);
-			atomic_init(&htab[i].hash_page_dirty, 0);
+			__db_atomic_init(&htab[i].hash_page_dirty, 0);
 		}
 
 		/*
@@ -302,7 +302,7 @@ no_prealloc:
 		} else
 			hp->mtx_hash = mtx_base + (i % dbenv->mp_mtxcount);
 		SH_TAILQ_INIT(&hp->hash_bucket);
-		atomic_init(&hp->hash_page_dirty, 0);
+		__db_atomic_init(&hp->hash_page_dirty, 0);
 #ifdef HAVE_STATISTICS
 		hp->hash_io_wait = 0;
 		hp->hash_frozen = hp->hash_thawed = hp->hash_frozen_freed = 0;
diff --git a/src/mutex/mut_method.c b/src/mutex/mut_method.c
index 09353b0..3c954b9 100644
--- a/src/mutex/mut_method.c
+++ b/src/mutex/mut_method.c
@@ -474,7 +474,7 @@ atomic_compare_exchange(env, v, oldval, newval)
 	MUTEX_LOCK(env, mtx);
 	ret = atomic_read(v) == oldval;
 	if (ret)
-		atomic_init(v, newval);
+		__db_atomic_init(v, newval);
 	MUTEX_UNLOCK(env, mtx);
 
 	return (ret);
diff --git a/src/mutex/mut_tas.c b/src/mutex/mut_tas.c
index 106b161..5a3b033 100644
--- a/src/mutex/mut_tas.c
+++ b/src/mutex/mut_tas.c
@@ -47,7 +47,7 @@ __db_tas_mutex_init(env, mutex, flags)
 
 #ifdef HAVE_SHARED_LATCHES
 	if (F_ISSET(mutexp, DB_MUTEX_SHARED))
-		atomic_init(&mutexp->sharecount, 0);
+		__db_atomic_init(&mutexp->sharecount, 0);
 	else
 #endif
 	if (MUTEX_INIT(&mutexp->tas)) {
@@ -536,7 +536,7 @@ __db_tas_mutex_unlock(env, mutex)
 			F_CLR(mutexp, DB_MUTEX_LOCKED);
 			/* Flush flag update before zeroing count */
 			MEMBAR_EXIT();
-			atomic_init(&mutexp->sharecount, 0);
+			__db_atomic_init(&mutexp->sharecount, 0);
 		} else {
 			DB_ASSERT(env, sharecount > 0);
 			MEMBAR_EXIT();
-- 
2.20.1