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Windows compat

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We mainly use Win32 functions, so cannot just use C-runtime strerror
to return error messages. We have to use Win32-specific messages.
Unfortunately, we document the API to return C-runtime error codes,
so we can't just switch to all Win32 error codes.
This commit is contained in:
Howard Chu 2014-07-09 09:31:49 -07:00
parent c4d0f90fce
commit f3573a7383
1 changed files with 34 additions and 1 deletions
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35
libraries/liblmdb/mdb.c
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@ -1259,6 +1259,14 @@ static char *const mdb_errstr[] = {
char *
mdb_strerror(int err)
{
#ifdef _WIN32
/** HACK: pad 4KB on stack over the buf. Return system msgs in buf.
* This works as long as no function between the call to mdb_strerror
* and the actual use of the message uses more than 4K of stack.
*/
char pad[4096];
char buf[1024], *ptr = buf;
#endif
int i;
if (!err)
return ("Successful return: 0");
@ -1268,7 +1276,32 @@ mdb_strerror(int err)
return mdb_errstr[i];
}
#ifdef _WIN32
/* These are the C-runtime error codes we use. The comment indicates
* their numeric value, and the Win32 error they would correspond to
* if the error actually came from a Win32 API. A major mess, we should
* have used LMDB-specific error codes for everything.
*/
switch(err) {
case ENOENT: /* 2, FILE_NOT_FOUND */
case EIO: /* 5, ACCESS_DENIED */
case ENOMEM: /* 12, INVALID_ACCESS */
case EACCES: /* 13, INVALID_DATA */
case EBUSY: /* 16, CURRENT_DIRECTORY */
case EINVAL: /* 22, BAD_COMMAND */
case ENOSPC: /* 28, OUT_OF_PAPER */
return strerror(err);
default:
;
}
buf[0] = 0;
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, err, 0, ptr, sizeof(buf), pad);
return ptr;
#else
return strerror(err);
#endif
}
/** assert(3) variant in cursor context */
@ -2572,7 +2605,7 @@ mdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn **ret)
}
if ((txn = calloc(1, size)) == NULL) {
DPRINTF(("calloc: %s", strerror(ErrCode())));
DPRINTF(("calloc: %s", strerror(errno)));
return ENOMEM;
}
txn->mt_dbs = (MDB_db *) ((char *)txn + tsize);