diff options
Diffstat (limited to 'src/include/port/win32.h')
| -rw-r--r-- | src/include/port/win32.h | 42 |
1 files changed, 32 insertions, 10 deletions
diff --git a/src/include/port/win32.h b/src/include/port/win32.h index 22d71272d1..dc2219be16 100644 --- a/src/include/port/win32.h +++ b/src/include/port/win32.h @@ -1,4 +1,4 @@ -/* $PostgreSQL: pgsql/src/include/port/win32.h,v 1.65 2007/01/11 02:42:31 momjian Exp $ */ +/* $PostgreSQL: pgsql/src/include/port/win32.h,v 1.66 2007/01/22 18:31:51 momjian Exp $ */ #if defined(_MSC_VER) || defined(__BORLANDC__) #define WIN32_ONLY_COMPILER @@ -115,16 +115,38 @@ int semop(int semId, struct sembuf * sops, int flag); /* * Signal stuff - * WIN32 doesn't have wait(), so the return value for children - * is simply the return value specified by the child, without - * any additional information on whether the child terminated - * on its own or via a signal. These macros are also used - * to interpret the return value of system(). + * + * For WIN32, there is no wait() call so there are no wait() macros + * to interpret the return value of system(). Instead, system() + * return values < 0x100 are used for exit() termination, and higher + * values are used to indicated non-exit() termination, which is + * similar to a unix-style signal exit (think SIGSEGV == + * STATUS_ACCESS_VIOLATION). Return values are broken up into groups: + * + * http://msdn2.microsoft.com/en-gb/library/aa489609.aspx + * + * NT_SUCCESS 0 - 0x3FFFFFFF + * NT_INFORMATION 0x40000000 - 0x7FFFFFFF + * NT_WARNING 0x80000000 - 0xBFFFFFFF + * NT_ERROR 0xC0000000 - 0xFFFFFFFF + * + * Effectively, we don't care on the severity of the return value from + * system(), we just need to know if it was because of exit() or generated + * by the system, and it seems values >= 0x100 are system-generated. + * See this URL for a list of WIN32 STATUS_* values: + * + * Wine (URL used in our error messages) - + * http://source.winehq.org/source/include/ntstatus.h + * Descriptions - http://www.comp.nus.edu.sg/~wuyongzh/my_doc/ntstatus.txt + * MS SDK - http://www.nologs.com/ntstatus.html + * + * Some day we might want to print descriptions for the most common + * exceptions, rather than printing a URL. */ -#define WEXITSTATUS(w) (w) -#define WIFEXITED(w) (true) -#define WIFSIGNALED(w) (false) -#define WTERMSIG(w) (0) +#define WIFEXITED(w) (((w) & 0xffffff00) == 0) +#define WIFSIGNALED(w) (!WIFEXITED(w)) +#define WEXITSTATUS(w) (w) +#define WTERMSIG(w) (w) #define sigmask(sig) ( 1 << ((sig)-1) ) |