[PATCH] ext: avoid clobbering existing system functions

[Eric Wong <e@80x24.org>]

These defines may cause incompatibilities if Ruby or other
system headers decide to clobber these.  It's also confusing to
override existing, well-known-and-standardized functions.
---
 ext/clogger_ext/blocking_helpers.h | 7 +++++--
 ext/clogger_ext/clogger.c          | 4 ++--
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/ext/clogger_ext/blocking_helpers.h b/ext/clogger_ext/blocking_helpers.h
index c03c2f5..15634b8 100644
--- a/ext/clogger_ext/blocking_helpers.h
+++ b/ext/clogger_ext/blocking_helpers.h
@@ -54,6 +54,9 @@ static ssize_t my_write(int fd, const void *buf, size_t count)
 
 	return r;
 }
-#  define stat(path,buf) my_stat((path),(buf))
-#  define write(fd,buf,count) my_write((fd),(buf),(count))
+#  define nogvl_stat(path,buf) my_stat((path),(buf))
+#  define nogvl_write(fd,buf,count) my_write((fd),(buf),(count))
+#else /* !WITHOUT_GVL, for Ruby 1.8 users: */
+#  define nogvl_stat(path,buf) stat((path),(buf))
+#  define nogvl_write(fd,buf,buf) write((fd),(buf),(count))
 #endif /* !WITHOUT_GVL */
diff --git a/ext/clogger_ext/clogger.c b/ext/clogger_ext/clogger.c
index 3db9235..f29cf26 100644
--- a/ext/clogger_ext/clogger.c
+++ b/ext/clogger_ext/clogger.c
@@ -243,7 +243,7 @@ static void write_full(int fd, const char *buf, size_t count)
 	ssize_t r;
 
 	while (count > 0) {
-		r = write(fd, buf, count);
+		r = nogvl_write(fd, buf, count);
 
 		if ((size_t)r == count) { /* overwhelmingly likely */
 			return;
@@ -993,7 +993,7 @@ static VALUE to_path(VALUE self)
 	if (sscanf(cpath, "/dev/fd/%u", &devfd) == 1)
 		rv = fstat((int)devfd, &sb);
 	else
-		rv = stat(cpath, &sb);
+		rv = nogvl_stat(cpath, &sb);
 
 	/*
 	 * calling this method implies the web server will bypass
-- 
EW