diff options
Diffstat (limited to 'otherlibs/win32unix/lockf.c')
| -rw-r--r-- | otherlibs/win32unix/lockf.c | 38 |
1 files changed, 22 insertions, 16 deletions
diff --git a/otherlibs/win32unix/lockf.c b/otherlibs/win32unix/lockf.c index 431b0ee6a..662b03206 100644 --- a/otherlibs/win32unix/lockf.c +++ b/otherlibs/win32unix/lockf.c @@ -51,7 +51,6 @@ static void set_file_pointer(HANDLE h, LARGE_INTEGER gohere, CAMLprim value unix_lockf(value fd, value cmd, value span) { CAMLparam3(fd, cmd, span); - int lock_ret; OVERLAPPED overlap; intnat l_len; HANDLE h; @@ -60,6 +59,7 @@ CAMLprim value unix_lockf(value fd, value cmd, value span) LARGE_INTEGER beg_position; LARGE_INTEGER lock_len; LARGE_INTEGER zero; + DWORD err = NO_ERROR; version.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); if(GetVersionEx(&version) == 0) { @@ -106,18 +106,21 @@ CAMLprim value unix_lockf(value fd, value cmd, value span) switch(Int_val(cmd)) { case 0: /* F_ULOCK - unlock */ - lock_ret = UnlockFileEx(h, 0, - lock_len.LowPart, lock_len.HighPart, &overlap); + if (! UnlockFileEx(h, 0, + lock_len.LowPart, lock_len.HighPart, &overlap)) + err = GetLastError(); break; case 1: /* F_LOCK - blocking write lock */ enter_blocking_section(); - lock_ret = LockFileEx(h, LOCKFILE_EXCLUSIVE_LOCK, 0, - lock_len.LowPart, lock_len.HighPart, &overlap); + if (! LockFileEx(h, LOCKFILE_EXCLUSIVE_LOCK, 0, + lock_len.LowPart, lock_len.HighPart, &overlap)) + err = GetLastError(); leave_blocking_section(); break; case 2: /* F_TLOCK - non-blocking write lock */ - lock_ret = LockFileEx(h, LOCKFILE_FAIL_IMMEDIATELY | LOCKFILE_EXCLUSIVE_LOCK, 0, - lock_len.LowPart, lock_len.HighPart, &overlap); + if (! LockFileEx(h, LOCKFILE_FAIL_IMMEDIATELY | LOCKFILE_EXCLUSIVE_LOCK, 0, + lock_len.LowPart, lock_len.HighPart, &overlap)) + err = GetLastError(); break; case 3: /* F_TEST - check whether a write lock can be obtained */ /* I'm doing this by aquiring an immediate write @@ -125,28 +128,31 @@ CAMLprim value unix_lockf(value fd, value cmd, value span) * this behavior matches anything in particular, but * it is not clear the nature of the lock test performed * by ocaml (unix) currently. */ - lock_ret = LockFileEx(h, LOCKFILE_FAIL_IMMEDIATELY | LOCKFILE_EXCLUSIVE_LOCK, 0, - lock_len.LowPart, lock_len.HighPart, &overlap); - if (lock_ret != 0) { + if (LockFileEx(h, LOCKFILE_FAIL_IMMEDIATELY | LOCKFILE_EXCLUSIVE_LOCK, 0, + lock_len.LowPart, lock_len.HighPart, &overlap)) { UnlockFileEx(h, 0, lock_len.LowPart, lock_len.HighPart, &overlap); + } else { + err = GetLastError(); } break; case 4: /* F_RLOCK - blocking read lock */ enter_blocking_section(); - lock_ret = LockFileEx(h, 0, 0, - lock_len.LowPart, lock_len.HighPart, &overlap); + if (! LockFileEx(h, 0, 0, + lock_len.LowPart, lock_len.HighPart, &overlap)) + err = GetLastError(); leave_blocking_section(); break; case 5: /* F_TRLOCK - non-blocking read lock */ - lock_ret = LockFileEx(h, LOCKFILE_FAIL_IMMEDIATELY, 0, - lock_len.LowPart, lock_len.HighPart, &overlap); + if (! LockFileEx(h, LOCKFILE_FAIL_IMMEDIATELY, 0, + lock_len.LowPart, lock_len.HighPart, &overlap)) + err = GetLastError(); break; default: errno = EINVAL; uerror("lockf", Nothing); } - if (lock_ret == 0) { - win32_maperr(GetLastError()); + if (err != NO_ERROR) { + win32_maperr(err); uerror("lockf", Nothing); } CAMLreturn(Val_unit); |