-/* $Id$ */
+#ifndef _PDCLIB_CONFIG_H
+#define _PDCLIB_CONFIG_H
/* Internal PDCLib configuration <_PDCLIB_config.h>
(Generic Template)
/* specific platforms, e.g. by swapping int instead of char. */
#define _PDCLIB_memswp( i, j, size ) char tmp; do { tmp = *i; *i++ = *j; *j++ = tmp; } while ( --size );
-/* Define this to some compiler directive that can be written after the */
-/* parameter list of a function declaration to indicate the function does */
-/* never return. If your compiler does not support such a directive, define */
-/* to nothing. (This is to avoid warnings with the exit functions under GCC.) */
-#define _PDCLIB_NORETURN __attribute__(( noreturn ))
-
/* The maximum value that errno can be set to. This is used to set the size */
/* of the array in struct lconv (<locale.h>) holding error messages for the */
/* strerror() and perror() functions. (If you change this value because you */
_PDCLIB_intmax rem;
};
+/* <time.h>: time_t
+ * The C standard doesn't define what representation of time is stored in
+ * time_t when returned by time() , but POSIX defines it to be seconds since the
+ * UNIX epoch and most appplications expect that.
+ *
+ * time_t is also used as the tv_sec member of struct timespec, which *is*
+ * defined as a linear count of seconds.
+ *
+ * time_t is defined as a "real type", so may be a floating point type, but with
+ * the presence of the nanosecond accurate struct timespec, and with the lack of
+ * any functions for manipulating more accurate values of time_t, this is
+ * probably not useful.
+ */
+#define _PDCLIB_time unsigned long long
+
+/* <time.h>: clock_t
+ *
+ * A count of "clock ticks", where the length of a clock tick is unspecified by
+ * the standard. The implementation is required to provide a macro,
+ * CLOCKS_PER_SEC, which is the number of "clock ticks" which corresponds to one
+ * second.
+ *
+ * clock_t may be any real type (i.e. integral or floating), and its type on
+ * various systems differs.
+ *
+ * On XSI systems, CLOCKS_PER_SEC must be defined to 1000000
+ */
+#define _PDCLIB_clock double
+#define _PDCLIB_CLOCKS_PER_SEC 1000000
+
+/* <time.h>: TIME_UTC
+ *
+ * The TIME_UTC parameter is passed to the timespec_get function in order to get
+ * the system time in UTC since an implementation defined epoch (not necessarily
+ * the same as that used for time_t). That said, on POSIX the obvious
+ * implementation of timespec_get for TIME_UTC is to wrap
+ * clock_gettime(CLOCK_REALTIME, ...), which is defined as time in UTC since the
+ * same epoch.
+ *
+ * This may be any non-zero integer value.
+ */
+#define _PDCLIB_TIME_UTC 1
+
/* -------------------------------------------------------------------------- */
/* Floating Point */
/* -------------------------------------------------------------------------- */
to an appropriate value. (Too small, and malloc() will call the kernel too
often. Too large, and you will waste memory.)
*/
-#define _PDCLIB_PAGESIZE 4096
+#define _PDCLIB_MALLOC_PAGESIZE 4096
+#define _PDCLIB_MALLOC_ALIGN 16
+#define _PDCLIB_MALLOC_GRANULARITY 64*1024
+#define _PDCLIB_MALLOC_TRIM_THRESHOLD 2*1024*1024
+#define _PDCLIB_MALLOC_MMAP_THRESHOLD 256*1024
+#define _PDCLIB_MALLOC_RELEASE_CHECK_RATE 4095
-/* Set this to the minimum memory node size. Any malloc() for a smaller size
- will be satisfied by a malloc() of this size instead (to avoid excessive
- fragmentation).
-*/
-#define _PDCLIB_MINALLOC 8
+/* TODO: Better document these */
/* I/O ---------------------------------------------------------------------- */
If you do not want that kind of translation, you might want to "match" the
values used by PDCLib with those used by the host OS, as to avoid confusion.
- The standard only defines three distinct errno values: ERANGE, EDOM, and
+ The C standard only defines three distinct errno values: ERANGE, EDOM, and
EILSEQ. The standard leaves it up to "the implementation" whether there are
any more beyond those three. There is some controversy as to whether errno is
such a good idea at all, so you might want to come up with a different error
- reporting facility for your platform. Since errno values beyond the three
- defined by the standard are not portable anyway (unless you look at POSIX),
- having your own error reporting facility would not hurt anybody either.
+ reporting facility for your platform.
+
+ Things used to say "Since errno values beyond the three defined by the
+ standard are not portable anyway (unless you look at POSIX), having your own
+ error reporting facility would not hurt anybody either." at this point.
+ However, then somebody birthed C++11 into the world, which copied POSIX's
+ errno values into C++. Yes, even EINTR. Therefore, this library defines
+ them. That said, thats nothing stopping you from using your own error
+ reporting facility for things outside the C library.
+
+ Sometimes the standard says to set errno to indicate an error, but does not
+ prescribe a value. We will use a value from the following list. If POSIX
+ defines a value, we use that; otherwise, we use as seems suitable.
+
+ If porting to a system which uses an errno-like reporting system (e.g. a
+ UNIX), you'll probably want to define them to match what the OS uses
*/
+/* C errno values */
#define _PDCLIB_ERANGE 1
#define _PDCLIB_EDOM 2
#define _PDCLIB_EILSEQ 3
-/* The following is not strictly "configuration", but there is no better place
- to explain it than here.
-
- PDCLib strives to be as generic as possible, so by default it does NOT define
- any values beyond the three standard ones above, even where it would have
- been prudent and convenient to do so. Any errno "caught" from the host OS,
- and some internal error conditions as well, are all lumped together into the
- value of '_PDCLIB_ERROR'.
-
- '_PDCLIB_ERROR' is STRICLY meant as a PLACEHOLDER only.
-
- You should NEVER ship an adaption of PDCLib still using that particular
- value. You should NEVER write code that *tests* for that value. Indeed it is
- not even conforming, since errno values should be defined as beginning with
- an uppercase 'E', and there is no mechanics in <errno.h> to unmask that
- particular value (for exactly that reason).
-
- There also is no error message available for this value through either the
- strerror() or perror() functions. It is being reported as "unknown" error.
-
- The idea is that you scan the source of PDCLib for occurrences of this macro
- and replace _PDCLIB_ERROR with whatever additional errno value you came up
- with for your platform.
-
- If you cannot find it within you to do that, tell your clients to check for
- an errno value larger than zero. That, at least, would be standard compliant
- (and fully portable).
-*/
-#define _PDCLIB_ERROR 4
-
+/* C++11/POSIX errno values */
+#define _PDCLIB_E2BIG 4
+#define _PDCLIB_ECONNRESET 5
+#define _PDCLIB_EISCONN 6
+#define _PDCLIB_ENOENT 7
+#define _PDCLIB_ENOTRECOVERABLE 8
+#define _PDCLIB_EROFS 9
+#define _PDCLIB_EACCES 10
+#define _PDCLIB_EDEADLK 11
+#define _PDCLIB_EISDIR 12
+#define _PDCLIB_ENOEXEC 13
+#define _PDCLIB_ENOTSOCK 14
+#define _PDCLIB_ESPIPE 15
+#define _PDCLIB_EADDRINUSE 16
+#define _PDCLIB_EDESTADDRREQ 17
+#define _PDCLIB_ELOOP 18
+#define _PDCLIB_ENOLCK 19
+#define _PDCLIB_ENOTSUPP 20
+#define _PDCLIB_ESRCH 21
+#define _PDCLIB_EADDRNOTAVAIL 22
+#define _PDCLIB_EMFILE 23
+#define _PDCLIB_ENOLINK 24
+#define _PDCLIB_ENOTTY 25
+#define _PDCLIB_ETIME 26
+#define _PDCLIB_EAFNOSUPPORT 27
+#define _PDCLIB_EEXIST 28
+#define _PDCLIB_EMLINK 29
+#define _PDCLIB_ENOMEM 30
+#define _PDCLIB_ENXIO 31
+#define _PDCLIB_ETIMEDOUT 32
+#define _PDCLIB_EAGAIN 33
+#define _PDCLIB_EFAULT 34
+#define _PDCLIB_EMSGSIZE 35
+#define _PDCLIB_ENOMSG 36
+#define _PDCLIB_EOPNOTSUPP 37
+#define _PDCLIB_ETXTBSY 38
+#define _PDCLIB_EALREADY 39
+#define _PDCLIB_EFBIG 40
+#define _PDCLIB_ENAMETOOLONG 41
+#define _PDCLIB_ENOPROTOOPT 42
+#define _PDCLIB_EOVERFLOW 43
+#define _PDCLIB_EWOULDBLOCK _PDCLIB_EAGAIN
+#define _PDCLIB_EBADF 44
+#define _PDCLIB_EHOSTUNREACH 45
+#define _PDCLIB_ENETDOWN 46
+#define _PDCLIB_ENOSPC 47
+#define _PDCLIB_EOWNERDEAD 48
+#define _PDCLIB_EXDEV 49
+#define _PDCLIB_EBADMSG 50
+#define _PDCLIB_EIDRM 51
+#define _PDCLIB_ENETRESET 52
+#define _PDCLIB_ENOSR 53
+#define _PDCLIB_EPERM 54
+#define _PDCLIB_EBUSY 55
+#define _PDCLIB_ENETUNREACH 56
+#define _PDCLIB_ENOSTR 57
+#define _PDCLIB_EPIPE 58
+#define _PDCLIB_ECANCELED 59
+#define _PDCLIB_EINPROGRESS 60
+#define _PDCLIB_ENFILE 61
+#define _PDCLIB_ENOSYS 62
+#define _PDCLIB_EPROTO 63
+#define _PDCLIB_ECHILD 64
+#define _PDCLIB_EINTR 65
+#define _PDCLIB_ENOBUFS 66
+#define _PDCLIB_ENOTCONN 67
+#define _PDCLIB_EPROTONOSUPPORT 68
+#define _PDCLIB_ECONNABORTED 69
+#define _PDCLIB_EINVAL 70
+#define _PDCLIB_ENODATA 71
+#define _PDCLIB_ENOTDIR 72
+#define _PDCLIB_EPROTOTYPE 73
+
+#endif
projects / pdclib / blobdiff