Adding upstream version 16.2.upstream/16.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 73 insertions, 0 deletions

diff --git a/src/include/common/fe_memutils.h b/src/include/common/fe_memutils.h
new file mode 100644
index 0000000..89601cc
--- /dev/null
+++ b/src/include/common/fe_memutils.h
@@ -0,0 +1,73 @@
+/*
+ *	fe_memutils.h
+ *		memory management support for frontend code
+ *
+ *	Copyright (c) 2003-2023, PostgreSQL Global Development Group
+ *
+ *	src/include/common/fe_memutils.h
+ */
+#ifndef FE_MEMUTILS_H
+#define FE_MEMUTILS_H
+
+/*
+ * Flags for pg_malloc_extended and palloc_extended, deliberately named
+ * the same as the backend flags.
+ */
+#define MCXT_ALLOC_HUGE			0x01	/* allow huge allocation (> 1 GB) not
+										 * actually used for frontends */
+#define MCXT_ALLOC_NO_OOM		0x02	/* no failure if out-of-memory */
+#define MCXT_ALLOC_ZERO			0x04	/* zero allocated memory */
+
+/*
+ * "Safe" memory allocation functions --- these exit(1) on failure
+ * (except pg_malloc_extended with MCXT_ALLOC_NO_OOM)
+ */
+extern char *pg_strdup(const char *in);
+extern void *pg_malloc(size_t size);
+extern void *pg_malloc0(size_t size);
+extern void *pg_malloc_extended(size_t size, int flags);
+extern void *pg_realloc(void *ptr, size_t size);
+extern void pg_free(void *ptr);
+
+/*
+ * Variants with easier notation and more type safety
+ */
+
+/*
+ * Allocate space for one object of type "type"
+ */
+#define pg_malloc_object(type) ((type *) pg_malloc(sizeof(type)))
+#define pg_malloc0_object(type) ((type *) pg_malloc0(sizeof(type)))
+
+/*
+ * Allocate space for "count" objects of type "type"
+ */
+#define pg_malloc_array(type, count) ((type *) pg_malloc(sizeof(type) * (count)))
+#define pg_malloc0_array(type, count) ((type *) pg_malloc0(sizeof(type) * (count)))
+
+/*
+ * Change size of allocation pointed to by "pointer" to have space for "count"
+ * objects of type "type"
+ */
+#define pg_realloc_array(pointer, type, count) ((type *) pg_realloc(pointer, sizeof(type) * (count)))
+
+/* Equivalent functions, deliberately named the same as backend functions */
+extern char *pstrdup(const char *in);
+extern char *pnstrdup(const char *in, Size size);
+extern void *palloc(Size size);
+extern void *palloc0(Size size);
+extern void *palloc_extended(Size size, int flags);
+extern void *repalloc(void *pointer, Size size);
+extern void pfree(void *pointer);
+
+#define palloc_object(type) ((type *) palloc(sizeof(type)))
+#define palloc0_object(type) ((type *) palloc0(sizeof(type)))
+#define palloc_array(type, count) ((type *) palloc(sizeof(type) * (count)))
+#define palloc0_array(type, count) ((type *) palloc0(sizeof(type) * (count)))
+#define repalloc_array(pointer, type, count) ((type *) repalloc(pointer, sizeof(type) * (count)))
+
+/* sprintf into a palloc'd buffer --- these are in psprintf.c */
+extern char *psprintf(const char *fmt,...) pg_attribute_printf(1, 2);
+extern size_t pvsnprintf(char *buf, size_t len, const char *fmt, va_list args) pg_attribute_printf(3, 0);
+
+#endif							/* FE_MEMUTILS_H */