diff options
| -rw-r--r-- | os/kernel/include/chsem.h | 1 | ||||
| -rw-r--r-- | os/kernel/src/chsem.c | 32 | ||||
| -rw-r--r-- | readme.txt | 1 | ||||
| -rw-r--r-- | todo.txt | 19 |
4 files changed, 40 insertions, 13 deletions
diff --git a/os/kernel/include/chsem.h b/os/kernel/include/chsem.h index 17c6a03e3..efed15189 100644 --- a/os/kernel/include/chsem.h +++ b/os/kernel/include/chsem.h @@ -51,6 +51,7 @@ extern "C" { msg_t chSemWaitTimeoutS(Semaphore *sp, systime_t time);
void chSemSignal(Semaphore *sp);
void chSemSignalI(Semaphore *sp);
+ void chSemSetCounterI(Semaphore *sp, cnt_t n);
#if CH_USE_SEMSW
msg_t chSemSignalWait(Semaphore *sps, Semaphore *spw);
#endif
diff --git a/os/kernel/src/chsem.c b/os/kernel/src/chsem.c index 3e1d2ce88..18ea9e996 100644 --- a/os/kernel/src/chsem.c +++ b/os/kernel/src/chsem.c @@ -311,6 +311,38 @@ void chSemSignalI(Semaphore *sp) { }
}
+/**
+ * @brief Sets the semaphore counter to the specified value.
+ * @post After invoking this function all the threads waiting on the
+ * semaphore, if any, are released and the semaphore counter is set
+ * to the specified, non negative, value.
+ * @post This function does not reschedule so a call to a rescheduling
+ * function must be performed before unlocking the kernel. Note that
+ * interrupt handlers always reschedule on exit so an explicit
+ * reschedule must not be performed in ISRs.
+ *
+ * @param[in] sp pointer to a @p Semaphore structure
+ * @param[in] n the new value of the semaphore counter. The value must
+ * be non-negative.
+ *
+ * @iclass
+ */
+void chSemSetCounterI(Semaphore *sp, cnt_t n) {
+ cnt_t cnt;
+
+ chDbgCheck((sp != NULL) && (n >= 0), "chSemSetCounterI");
+
+ chDbgAssert(((sp->s_cnt >= 0) && isempty(&sp->s_queue)) ||
+ ((sp->s_cnt < 0) && notempty(&sp->s_queue)),
+ "chSemSetCounterI(), #1",
+ "inconsistent semaphore");
+
+ cnt = sp->s_cnt;
+ sp->s_cnt = n;
+ while (++cnt <= 0)
+ chSchReadyI(lifo_remove(&sp->s_queue))->p_u.rdymsg = RDY_OK;
+}
+
#if CH_USE_SEMSW
/**
* @brief Performs atomic signal and wait operations on two semaphores.
diff --git a/readme.txt b/readme.txt index 342f92189..548de2c07 100644 --- a/readme.txt +++ b/readme.txt @@ -74,6 +74,7 @@ - NEW: Integrated the STM32 GCC, IAR and RVCT demos in a single demo with
multiple project files, the code is exactly the same.
- NEW: Added an USB clock configuration in the STM32 HAL driver (LD, MD, HD).
+- NEW: New semaphore API chSemSetCounterI().
- CHANGE: Modified the ADC and CAN drivers to allow a NULL pointer for
the configuration structure if it is not required by the implementation.
- CHANGE: Modified the MMC_SPI driver to *require* a NULL as pointer to
@@ -62,18 +62,11 @@ X Support for not just Makefiles (Ride7, Crossworks etc). ? Make thread functions return void.
- Introduce a "THREAD" function prefix in order to hide compiler-specific
optimizations for thread functions.
-- Move I/O queues out of the kernel into an new "oslib" category.
-- Add an I/O buffers mechanism to the oslib category.
-- Move MemStreams to the oslib category.
-- Move iochannels and file interfaces to the oslib category.
-? Evaluate moving mailboxes to the oslib category.
-- Make the oslib category appear in the general documentation and the various
- kernel reference manuals.
-- IAR port for Cortex-Mx, add demos for all the supported families.
-- Keil port for Cortex-Mx, add demos for all the supported families.
-- Add an USB abstract device driver class.
-- USB driver implementation for STM32F103/STM32F102.
-- Add a Serial over USB generic device driver implementing a USB Communication
+X IAR port for Cortex-Mx, add demos for all the supported families.
+X Keil port for Cortex-Mx, add demos for all the supported families.
+X Add an USB abstract device driver class.
+X USB driver implementation for STM32F103/STM32F102.
+X Add a Serial over USB generic device driver implementing a USB Communication
Device Class and offering a Serial-like interface to the applications.
X Except for the above, bug fixing only until the 2.2.0 release.
@@ -87,7 +80,7 @@ X I2C device driver class support and at least one implementation. - Serial over UART complex driver driver, evaluate from the performance
results if to make obsolete the current dedicated Serial driver.
X Shared DMA channels support in the STM32/STM8L HALs.
-X New device driver models: Clock, Systick, RTC, WDG, DAC, USB, Power Monitor.
+X New device driver models: Clock, Systick, RTC, WDG, DAC, Power Monitor.
- MAC driver for STM32F107 (hardware missing).
- Device drivers for STM8/STM8L (ADC, PWM, bring them on par with STM32).
- Batch testing of the ARM7/ARMCMx port using OpenOCD, with reports.
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