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C: now completely unmapping files before truncating them to a smaller

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size (#68)
This commit is contained in:
MercierC
2021-03-11 15:12:40 +13:00
parent 41fbae7b6c
commit 7f0f63cf26
4 changed files with 156 additions and 34 deletions
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19
src/obidms.c
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@ -316,6 +316,15 @@ static int enlarge_infos_file(OBIDMS_p dms, size_t new_size)
multiple = ceil((double) new_size / (double) getpagesize());
rounded_new_size = multiple * getpagesize();
// Unmap the entire file before truncating it (WSL requirement)
if (munmap(dms->infos, (dms->infos)->file_size) < 0)
{
obi_set_errno(OBIDMS_UNKNOWN_ERROR);
obidebug(1, "\nError munmapping a DMS information file when enlarging");
close(infos_file_descriptor);
return -1;
}
// Enlarge the file
if (ftruncate(infos_file_descriptor, rounded_new_size) < 0)
{
@ -325,15 +334,7 @@ static int enlarge_infos_file(OBIDMS_p dms, size_t new_size)
return -1;
}
// Unmap and remap the file
if (munmap(dms->infos, (dms->infos)->file_size) < 0)
{
obi_set_errno(OBIDMS_UNKNOWN_ERROR);
obidebug(1, "\nError munmapping a DMS information file when enlarging");
close(infos_file_descriptor);
return -1;
}
// Remap the file
dms->infos = mmap(NULL,
rounded_new_size,
PROT_READ | PROT_WRITE,