Remove git_errno

It was not being used by any methods (only by malloc and calloc), and
since it needs to be TLS, it cannot be exported on DLLs on Windows.

Burn it with fire. The API always returns error codes!

Signed-off-by: Vicent Marti <tanoku@gmail.com>

src/common.h

@@ -49,7 +49,6 @@ typedef SSIZE_T ssize_t;
 #include "git2/common.h"
 #include "util.h"
 #include "thread-utils.h"
-#include "errors.h"
 #include "bswap.h"
 
 #define GIT_PATH_MAX 4096

src/errors.c

 #include "common.h"
 #include "thread-utils.h" /* for GIT_TLS */
 
-#if defined(GIT_TLS)
-/* compile-time constant initialization required */
-GIT_TLS int git_errno = 0;
-
-#elif defined(GIT_HAS_PTHREAD)
-
-static pthread_key_t errno_key;
-
-static void init_errno(void) __attribute__((constructor));
-static void init_errno(void)
-{
-	pthread_key_create(&errno_key, free);
-}
-
-int *git__errno_storage(void)
-{
-	int *e = pthread_getspecific(errno_key);
-	if (!e) {
-#undef calloc
-		e = calloc(1, sizeof(*e));
-#define calloc(a,b) GIT__FORBID_MALLOC
-		pthread_setspecific(errno_key, e);
-	}
-	return e;
-}
-
-#endif
-
 static struct {
 	int num;
 	const char *str;

src/errors.h

-#ifndef INCLUDE_errors_h__
-#define INCLUDE_errors_h__
-
-#include "git2/errors.h"
-
-/* convenience functions */
-GIT_INLINE(int) git_int_error(int code)
-{
-	git_errno = code;
-	return code;
-}
-
-GIT_INLINE(int) git_os_error(void)
-{
-	return git_int_error(GIT_EOSERR);
-}
-
-GIT_INLINE(void) *git_ptr_error(int code)
-{
-	git_errno = code;
-	return NULL;
-}
-
-#endif

src/fileops.c

@@ -4,13 +4,13 @@
 int gitfo_open(const char *path, int flags)
 {
 	int fd = open(path, flags | O_BINARY);
-	return fd >= 0 ? fd : git_os_error();
+	return fd >= 0 ? fd : GIT_EOSERR;
 }
 
 int gitfo_creat(const char *path, int mode)
 {
 	int fd = open(path, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, mode);
-	return fd >= 0 ? fd : git_os_error();
+	return fd >= 0 ? fd : GIT_EOSERR;
 }
 
 int gitfo_read(git_file fd, void *buf, size_t cnt)
@@ -21,11 +21,11 @@ int gitfo_read(git_file fd, void *buf, size_t cnt)
 		if (r < 0) {
 			if (errno == EINTR || errno == EAGAIN)
 				continue;
-			return git_os_error();
+			return GIT_EOSERR;
 		}
 		if (!r) {
 			errno = EPIPE;
-			return git_os_error();
+			return GIT_EOSERR;
 		}
 		cnt -= r;
 		b += r;
@@ -41,11 +41,11 @@ int gitfo_write(git_file fd, void *buf, size_t cnt)
 		if (r < 0) {
 			if (errno == EINTR || errno == EAGAIN)
 				continue;
-			return git_os_error();
+			return GIT_EOSERR;
 		}
 		if (!r) {
 			errno = EPIPE;
-			return git_os_error();
+			return GIT_EOSERR;
 		}
 		cnt -= r;
 		b += r;
@@ -92,7 +92,7 @@ off_t gitfo_size(git_file fd)
 {
 	struct stat sb;
 	if (gitfo_fstat(fd, &sb))
-		return git_os_error();
+		return GIT_EOSERR;
 	return sb.st_size;
 }
 
@@ -151,13 +151,13 @@ int gitfo_move_file(char *from, char *to)
 	if (!rename(from, to))
 		return GIT_SUCCESS;
 
-	return git_os_error();
+	return GIT_EOSERR;
 }
 
 int gitfo_map_ro(git_map *out, git_file fd, off_t begin, size_t len)
 {
 	if (git__mmap(out, len, GIT_PROT_READ, GIT_MAP_SHARED, fd, begin) < GIT_SUCCESS)
-		return git_os_error();
+		return GIT_EOSERR;
 	return GIT_SUCCESS;
 }
 
@@ -275,7 +275,7 @@ int gitfo_dirent(
 
 	dir = opendir(path);
 	if (!dir)
-		return git_os_error();
+		return GIT_EOSERR;
 
 	while ((de = readdir(dir)) != NULL) {
 		size_t de_len;

src/git2/errors.h

@@ -33,16 +33,6 @@
  */
 GIT_BEGIN_DECL
 
-/** The git errno. */
-#if defined(GIT_TLS)
-GIT_EXTERN_TLS(int) git_errno;
-
-#elif defined(GIT_HAS_PTHREAD)
-# define git_errno (*git__errno_storage())
-GIT_EXTERN(int *) git__errno_storage(void);
-
-#endif
-
 /**
  * strerror() for the Git library
  * @param num The error code to explain

src/unix/map.c

@@ -40,7 +40,7 @@ int git__mmap(git_map *out, size_t len, int prot, int flags, int fd, off_t offse
 
 	out->data = mmap(NULL, len, mprot, mflag, fd, offset);
 	if (!out->data || out->data == MAP_FAILED)
-		return git_os_error();
+		return GIT_EOSERR;
 	out->len = len;
 
 	return GIT_SUCCESS;

src/util.c

@@ -3,30 +3,6 @@
 #include <stdarg.h>
 #include <stdio.h>
 
-void *git__malloc(size_t n)
-{
-	void *r = malloc(n);
-	if (!r)
-		return git_ptr_error(GIT_ENOMEM);
-	return r;
-}
-
-void *git__calloc(size_t a, size_t b)
-{
-	void *r = calloc(a, b);
-	if (!r)
-		return git_ptr_error(GIT_ENOMEM);
-	return r;
-}
-
-char *git__strdup(const char *s)
-{
-	char *r = strdup(s);
-	if (!r)
-		return git_ptr_error(GIT_ENOMEM);
-	return r;
-}
-
 int git__fmt(char *buf, size_t buf_sz, const char *fmt, ...)
 {
 	va_list va;

src/util.h

@@ -3,28 +3,16 @@
 
 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
 
-GIT_EXTERN(void *) git__malloc(size_t);
-GIT_EXTERN(void *) git__calloc(size_t, size_t);
-GIT_EXTERN(char *) git__strdup(const char *);
-
-#ifndef GIT__NO_HIDE_MALLOC
-# define GIT__FORBID_MALLOC do_not_use_malloc_directly
-
-# ifdef malloc
-#  undef malloc
-# endif
-# define malloc(a)          GIT__FORBID_MALLOC
-
-# ifdef calloc
-#  undef calloc
-# endif
-# define calloc(a,b)        GIT__FORBID_MALLOC
-
-# ifdef strdup
-#  undef strdup
-# endif
-# define strdup(a)          GIT__FORBID_MALLOC
-#endif
+/* 
+ * Don't wrap malloc/calloc.
+ * Use the default versions in glibc, and make
+ * sure that any methods that allocate memory
+ * return a GIT_ENOMEM error when allocation
+ * fails.
+ */
+#define git__malloc malloc
+#define git__calloc calloc
+#define git__strdup strdup
 
 GIT_EXTERN(int) git__fmt(char *, size_t, const char *, ...)
 	GIT_FORMAT_PRINTF(3, 4);

tests/t0001-errno.c

-#include "test_lib.h"
-#include "errors.h"
-
-BEGIN_TEST(errno_zero_on_init)
-	must_be_true(git_errno == 0);
-END_TEST
-
-BEGIN_TEST(set_ENOTOID)
-	must_be_true(GIT_ENOTOID != 0);
-	git_errno = GIT_ENOTOID;
-	must_be_true(git_errno == GIT_ENOTOID);
-END_TEST