Changeset b7fd2a0 in mainline for uspace/lib/c/include/futex.h

Timestamp:

2018-01-13T03:10:29Z (7 years ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

a53ed3a

Parents:

36f0738

Message:

Use errno_t in all uspace and kernel code.

Change type of every variable, parameter and return value that holds an
<errno.h> constant to either errno_t (the usual case), or sys_errno_t
(some places in kernel). This is for the purpose of self-documentation,
as well as for type-checking with a bit of type definition hackery.

Although this is a massive commit, it is a simple text replacement, and thus
is very easy to verify. Simply do the following:

`
git checkout <this commit's hash>
git reset HEAD
<sup>git add .
tools/srepl '\berrno_t\b' int
git add .
tools/srepl '\bsys_errno_t\b' sysarg_t
git reset
git diff
`</sup>

While this doesn't ensure that the replacements are correct, it does ensure
that the commit doesn't do anything except those replacements. Since errno_t
is typedef'd to int in the usual case (and sys_errno_t to sysarg_t), even if
incorrect, this commit cannot change behavior.

File:

• uspace/lib/c/include/futex.h (modified) (2 diffs)

uspace/lib/c/include/futex.h

@@ -126 +126 @@
  *
  */
-static inline int futex_down(futex_t *futex)
+static inline errno_t futex_down(futex_t *futex)
 {
         if ((atomic_signed_t) atomic_predec(&futex->val) < 0)
-                return (int) __SYSCALL1(SYS_FUTEX_SLEEP, (sysarg_t) &futex->val.count);
+                return (errno_t) __SYSCALL1(SYS_FUTEX_SLEEP, (sysarg_t) &futex->val.count);
         
         return EOK;
@@ -143 +143 @@
  *
  */
-static inline int futex_up(futex_t *futex)
+static inline errno_t futex_up(futex_t *futex)
 {
         if ((atomic_signed_t) atomic_postinc(&futex->val) < 0)
-                return (int) __SYSCALL1(SYS_FUTEX_WAKEUP, (sysarg_t) &futex->val.count);
+                return (errno_t) __SYSCALL1(SYS_FUTEX_WAKEUP, (sysarg_t) &futex->val.count);
         
         return EOK;