diff options
| -rw-r--r-- | git-compat-util.h | 22 | ||||
| -rw-r--r-- | wrapper.c | 22 |
2 files changed, 22 insertions, 22 deletions
diff --git a/git-compat-util.h b/git-compat-util.h index 58d7708296..79977caed6 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -995,6 +995,28 @@ static inline unsigned long cast_size_t_to_ulong(size_t a) return (unsigned long)a; } +/* + * Limit size of IO chunks, because huge chunks only cause pain. OS X + * 64-bit is buggy, returning EINVAL if len >= INT_MAX; and even in + * the absence of bugs, large chunks can result in bad latencies when + * you decide to kill the process. + * + * We pick 8 MiB as our default, but if the platform defines SSIZE_MAX + * that is smaller than that, clip it to SSIZE_MAX, as a call to + * read(2) or write(2) larger than that is allowed to fail. As the last + * resort, we allow a port to pass via CFLAGS e.g. "-DMAX_IO_SIZE=value" + * to override this, if the definition of SSIZE_MAX given by the platform + * is broken. + */ +#ifndef MAX_IO_SIZE +# define MAX_IO_SIZE_DEFAULT (8*1024*1024) +# if defined(SSIZE_MAX) && (SSIZE_MAX < MAX_IO_SIZE_DEFAULT) +# define MAX_IO_SIZE SSIZE_MAX +# else +# define MAX_IO_SIZE MAX_IO_SIZE_DEFAULT +# endif +#endif + #ifdef HAVE_ALLOCA_H # include <alloca.h> # define xalloca(size) (alloca(size)) @@ -161,28 +161,6 @@ void xsetenv(const char *name, const char *value, int overwrite) die_errno(_("could not setenv '%s'"), name ? name : "(null)"); } -/* - * Limit size of IO chunks, because huge chunks only cause pain. OS X - * 64-bit is buggy, returning EINVAL if len >= INT_MAX; and even in - * the absence of bugs, large chunks can result in bad latencies when - * you decide to kill the process. - * - * We pick 8 MiB as our default, but if the platform defines SSIZE_MAX - * that is smaller than that, clip it to SSIZE_MAX, as a call to - * read(2) or write(2) larger than that is allowed to fail. As the last - * resort, we allow a port to pass via CFLAGS e.g. "-DMAX_IO_SIZE=value" - * to override this, if the definition of SSIZE_MAX given by the platform - * is broken. - */ -#ifndef MAX_IO_SIZE -# define MAX_IO_SIZE_DEFAULT (8*1024*1024) -# if defined(SSIZE_MAX) && (SSIZE_MAX < MAX_IO_SIZE_DEFAULT) -# define MAX_IO_SIZE SSIZE_MAX -# else -# define MAX_IO_SIZE MAX_IO_SIZE_DEFAULT -# endif -#endif - /** * xopen() is the same as open(), but it die()s if the open() fails. */ |