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-rw-r--r--libnetdata/onewayalloc/onewayalloc.c35
-rw-r--r--libnetdata/onewayalloc/onewayalloc.h2
2 files changed, 27 insertions, 10 deletions
diff --git a/libnetdata/onewayalloc/onewayalloc.c b/libnetdata/onewayalloc/onewayalloc.c
index a048aebf6..59c3b6859 100644
--- a/libnetdata/onewayalloc/onewayalloc.c
+++ b/libnetdata/onewayalloc/onewayalloc.c
@@ -1,7 +1,7 @@
#include "onewayalloc.h"
-static size_t OWA_NATURAL_PAGE_SIZE = 0;
-static size_t OWA_NATURAL_ALIGNMENT = sizeof(int*);
+// https://www.gnu.org/software/libc/manual/html_node/Aligned-Memory-Blocks.html
+#define OWA_NATURAL_ALIGNMENT (sizeof(uintptr_t) * 2)
typedef struct owa_page {
size_t stats_pages;
@@ -28,15 +28,22 @@ static inline size_t natural_alignment(size_t size) {
// any number of times, for any amount of memory.
static OWA_PAGE *onewayalloc_create_internal(OWA_PAGE *head, size_t size_hint) {
- if(unlikely(!OWA_NATURAL_PAGE_SIZE))
- OWA_NATURAL_PAGE_SIZE = sysconf(_SC_PAGE_SIZE);
+ static size_t OWA_NATURAL_PAGE_SIZE = 0;
+
+ if(unlikely(!OWA_NATURAL_PAGE_SIZE)) {
+ long int page_size = sysconf(_SC_PAGE_SIZE);
+ if (unlikely(page_size == -1))
+ OWA_NATURAL_PAGE_SIZE = 4096;
+ else
+ OWA_NATURAL_PAGE_SIZE = page_size;
+ }
// our default page size
size_t size = OWA_NATURAL_PAGE_SIZE;
// make sure the new page will fit both the requested size
// and the OWA_PAGE structure at its beginning
- size_hint += sizeof(OWA_PAGE);
+ size_hint += natural_alignment(sizeof(OWA_PAGE));
// prefer the user size if it is bigger than our size
if(size_hint > size) size = size_hint;
@@ -75,11 +82,11 @@ static OWA_PAGE *onewayalloc_create_internal(OWA_PAGE *head, size_t size_hint) {
head->stats_pages++;
head->stats_pages_size += size;
- return (ONEWAYALLOC *)page;
+ return page;
}
ONEWAYALLOC *onewayalloc_create(size_t size_hint) {
- return onewayalloc_create_internal(NULL, size_hint);
+ return (ONEWAYALLOC *)onewayalloc_create_internal(NULL, size_hint);
}
void *onewayalloc_mallocz(ONEWAYALLOC *owa, size_t size) {
@@ -138,11 +145,11 @@ void onewayalloc_freez(ONEWAYALLOC *owa __maybe_unused, const void *ptr __maybe_
OWA_PAGE *head = (OWA_PAGE *)owa;
OWA_PAGE *page;
- size_t seeking = (size_t)ptr;
+ uintptr_t seeking = (uintptr_t)ptr;
for(page = head; page ;page = page->next) {
- size_t start = (size_t)page;
- size_t end = start + page->size;
+ uintptr_t start = (uintptr_t)page;
+ uintptr_t end = start + page->size;
if(seeking >= start && seeking <= end) {
// found it - it is ours
@@ -159,6 +166,14 @@ void onewayalloc_freez(ONEWAYALLOC *owa __maybe_unused, const void *ptr __maybe_
return;
}
+void *onewayalloc_doublesize(ONEWAYALLOC *owa, const void *src, size_t oldsize) {
+ size_t newsize = oldsize * 2;
+ void *dst = onewayalloc_mallocz(owa, newsize);
+ memcpy(dst, src, oldsize);
+ onewayalloc_freez(owa, src);
+ return dst;
+}
+
void onewayalloc_destroy(ONEWAYALLOC *owa) {
if(!owa) return;
diff --git a/libnetdata/onewayalloc/onewayalloc.h b/libnetdata/onewayalloc/onewayalloc.h
index ed8f12f39..9eb908bfb 100644
--- a/libnetdata/onewayalloc/onewayalloc.h
+++ b/libnetdata/onewayalloc/onewayalloc.h
@@ -14,4 +14,6 @@ extern char *onewayalloc_strdupz(ONEWAYALLOC *owa, const char *s);
extern void *onewayalloc_memdupz(ONEWAYALLOC *owa, const void *src, size_t size);
extern void onewayalloc_freez(ONEWAYALLOC *owa, const void *ptr);
+extern void *onewayalloc_doublesize(ONEWAYALLOC *owa, const void *src, size_t oldsize);
+
#endif // ONEWAYALLOC_H