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authorAlex Auvolat <alex.auvolat@ens.fr>2015-02-13 20:28:54 +0100
committerAlex Auvolat <alex.auvolat@ens.fr>2015-02-13 20:28:54 +0100
commitcf0b8a52287ee7c747b1d5a7d77abdef1fb46f94 (patch)
treed06ada519003a0794d3107fea1e882b737b5a00c /src/common/mutex.c
parente484c92ff08e54e7cbfdb815a5b254507dade003 (diff)
downloadkogata-cf0b8a52287ee7c747b1d5a7d77abdef1fb46f94.tar.gz
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Reorganize code in preparation for user apps.
Diffstat (limited to 'src/common/mutex.c')
-rw-r--r--src/common/mutex.c27
1 files changed, 0 insertions, 27 deletions
diff --git a/src/common/mutex.c b/src/common/mutex.c
deleted file mode 100644
index b345ee5..0000000
--- a/src/common/mutex.c
+++ /dev/null
@@ -1,27 +0,0 @@
-#include <mutex.h>
-
-/* Internal use only. This function is atomic, meaning it cannot be interrupted by a system task switch. */
-static uint32_t atomic_exchange(uint32_t* ptr, uint32_t newval) {
- uint32_t r;
- asm volatile("xchg (%%ecx), %%eax" : "=a"(r) : "c"(ptr), "a"(newval));
- return r;
-}
-
-void mutex_lock(uint32_t* mutex) {
- while (atomic_exchange(mutex, MUTEX_LOCKED) == MUTEX_LOCKED) {
- yield();
- }
-}
-
-bool mutex_try_lock(uint32_t* mutex) {
- if (atomic_exchange(mutex, MUTEX_LOCKED) == MUTEX_LOCKED) {
- return false;
- }
- return true;
-}
-
-void mutex_unlock(uint32_t* mutex) {
- *mutex = MUTEX_UNLOCKED;
-}
-
-/* vim: set ts=4 sw=4 tw=0 noet :*/