|
|
|
@ -34,23 +34,36 @@ void iovec_free( int *iovec_entries, struct iovec **iovector ) {
@@ -34,23 +34,36 @@ void iovec_free( int *iovec_entries, struct iovec **iovector ) {
|
|
|
|
|
*iovec_entries = 0; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
void iovec_fixlast( int *iovec_entries, struct iovec **iovector, size_t new_alloc ) { |
|
|
|
|
void iovec_fixlast( int *iovec_entries, struct iovec **iovector, void *last_ptr ) { |
|
|
|
|
int page_size = getpagesize(); |
|
|
|
|
size_t old_alloc, old_pages, new_pages; |
|
|
|
|
size_t old_alloc, new_alloc, old_pages, new_pages; |
|
|
|
|
char * base = (char*)((*iovector)[ *iovec_entries - 1 ]).iov_base; |
|
|
|
|
|
|
|
|
|
if( !*iovec_entries ) return; |
|
|
|
|
|
|
|
|
|
old_alloc = ((*iovector)[ *iovec_entries - 1 ]).iov_len; |
|
|
|
|
new_alloc = ((char*)last_ptr) - base; |
|
|
|
|
old_pages = 1 + old_alloc / page_size; |
|
|
|
|
new_pages = 1 + new_alloc / page_size; |
|
|
|
|
|
|
|
|
|
if( old_pages != new_pages ) { |
|
|
|
|
munmap( ((char*)((*iovector)[ *iovec_entries - 1 ]).iov_base ) + new_pages * page_size, |
|
|
|
|
old_alloc - new_pages * page_size ); |
|
|
|
|
munmap( base + new_pages * page_size, old_alloc - new_pages * page_size ); |
|
|
|
|
} |
|
|
|
|
((*iovector)[*iovec_entries - 1 ]).iov_len = new_alloc; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
void *iovec_fix_increase_or_free( int *iovec_entries, struct iovec **iovector, void *last_ptr, size_t new_alloc ) { |
|
|
|
|
void *new_ptr; |
|
|
|
|
|
|
|
|
|
iovec_fixlast( iovec_entries, iovector, last_ptr ); |
|
|
|
|
|
|
|
|
|
if( !( new_ptr = iovec_increase( iovec_entries, iovector, new_alloc ) ) ) |
|
|
|
|
iovec_free( iovec_entries, iovector ); |
|
|
|
|
|
|
|
|
|
return new_ptr; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
size_t iovec_length( int *iovec_entries, struct iovec **iovector ) { |
|
|
|
|
size_t length = 0; |
|
|
|
|
int i; |
|
|
|
|