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make it possible to control the initial NGF size

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This commit is contained in:
Krasimir Angelov
2023-01-29 21:04:08 +01:00
parent 8ee624bc68
commit 6d856b2ce0
9 changed files with 52 additions and 33 deletions
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13
src/runtime/c/pgf/db.cxx
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@@ -134,9 +134,16 @@ struct PGF_INTERNAL_DECL malloc_state
revision_entry revisions[];
};
static inline ssize_t get_mmap_size(size_t init_size, size_t page_size)
{
size_t mmap_size = ((init_size+page_size-1)/page_size)*page_size;
if (mmap_size < page_size*2)
mmap_size = page_size*2;
return mmap_size;
}
PGF_INTERNAL
PgfDB::PgfDB(const char* filepath, int flags, int mode) {
PgfDB::PgfDB(const char* filepath, int flags, int mode, size_t init_size) {
bool is_new = false;
fd = -1;
@@ -147,7 +154,7 @@ PgfDB::PgfDB(const char* filepath, int flags, int mode) {
if (filepath == NULL) {
this->filepath = NULL;
mmap_size = page_size*2;
mmap_size = get_mmap_size(init_size, page_size);
is_new = true;
} else {
fd = open(filepath, flags, mode);
@@ -163,7 +170,7 @@ PgfDB::PgfDB(const char* filepath, int flags, int mode) {
is_new = false;
if (mmap_size == 0) {
mmap_size = page_size*2;
mmap_size = get_mmap_size(init_size, page_size);
if (ftruncate(fd, mmap_size) < 0) {
int code = errno;
close(fd);