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