From 499ca6c243b05da176a2d4bd9a2317f0b28afc7f Mon Sep 17 00:00:00 2001 From: Alex AUVOLAT Date: Sat, 19 May 2012 11:45:49 +0200 Subject: Introducing FWIK, the userland C++ framework. Far from complete. --- src/kernel/lib/sched.c | 26 -------------------------- src/kernel/lib/sched.cpp | 27 +++++++++++++++++++++++++++ 2 files changed, 27 insertions(+), 26 deletions(-) delete mode 100644 src/kernel/lib/sched.c create mode 100644 src/kernel/lib/sched.cpp (limited to 'src/kernel/lib') diff --git a/src/kernel/lib/sched.c b/src/kernel/lib/sched.c deleted file mode 100644 index 29ea8a8..0000000 --- a/src/kernel/lib/sched.c +++ /dev/null @@ -1,26 +0,0 @@ -#include - -/* 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; -} - -int mutex_lock(uint32_t* mutex) { - while (atomic_exchange(mutex, MUTEX_LOCKED) == MUTEX_LOCKED) { - schedule(); - } - return 0; -} - -int mutex_lockE(uint32_t* mutex) { - if (atomic_exchange(mutex, MUTEX_LOCKED) == MUTEX_LOCKED) { - return 0; - } - return 1; -} - -void mutex_unlock(uint32_t* mutex) { - *mutex = MUTEX_UNLOCKED; -} diff --git a/src/kernel/lib/sched.cpp b/src/kernel/lib/sched.cpp new file mode 100644 index 0000000..06900d1 --- /dev/null +++ b/src/kernel/lib/sched.cpp @@ -0,0 +1,27 @@ +#include +#include + +/* 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; +} + +int mutex_lock(uint32_t* mutex) { + while (atomic_exchange(mutex, MUTEX_LOCKED) == MUTEX_LOCKED) { + schedule(); + } + return 0; +} + +int mutex_lockE(uint32_t* mutex) { + if (atomic_exchange(mutex, MUTEX_LOCKED) == MUTEX_LOCKED) { + return 0; + } + return 1; +} + +void mutex_unlock(uint32_t* mutex) { + *mutex = MUTEX_UNLOCKED; +} -- cgit v1.2.3