diff options
Diffstat (limited to 'lcmodule/source/cnh1605551_ldr_utilities/critical_section/critical_section_linux.c')
-rwxr-xr-x | lcmodule/source/cnh1605551_ldr_utilities/critical_section/critical_section_linux.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/lcmodule/source/cnh1605551_ldr_utilities/critical_section/critical_section_linux.c b/lcmodule/source/cnh1605551_ldr_utilities/critical_section/critical_section_linux.c new file mode 100755 index 0000000..0114a47 --- /dev/null +++ b/lcmodule/source/cnh1605551_ldr_utilities/critical_section/critical_section_linux.c @@ -0,0 +1,121 @@ +/******************************************************************************* + * $Copyright ST-Ericsson 2011 $ + ******************************************************************************/ + +/* + * @addtogroup critical_section + * @{ + */ + +/******************************************************************************* + * Includes + ******************************************************************************/ +#include <stdlib.h> +#include <pthread.h> +#include "t_basicdefinitions.h" +#include "r_critical_section.h" + +/******************************************************************************* + * File scope types, constants and variables + ******************************************************************************/ + +/******************************************************************************* + * Declaration of internal functions + ******************************************************************************/ + +/******************************************************************************* + * Definition of external functions + ******************************************************************************/ +/** + * Perform initialization of Critical Section. + * + * Creates a critical section object and returns pointer to it for later usage + * when it is needed to enter and leave the critical part of the code, + * and destroy the critical section object when not used anymore. + * + * @retval Pointer to initialized critical section object if initialization was + * successful, otherwise NULL. + */ +CriticalSection_t Do_CriticalSection_Create(void) +{ + int result = -1; + pthread_mutex_t* cs = (pthread_mutex_t*)malloc(sizeof(pthread_mutex_t)); + + if (NULL != cs) { + result = pthread_mutex_init(cs, NULL); + if (0 != result) { + free(cs); + cs = NULL; + } + } + + return (CriticalSection_t)cs; +} + +/** + * Free resources used for Critical Section object. + * + * Free all resources and destroy the critical section object given as parameter + * to the function. + * + * @param [in] CriticalSectionObject Pointer to pointer at the object to be destroyed. + * + * @retval None. + */ +void Do_CriticalSection_Destroy(CriticalSection_t *CriticalSectionObject) +{ + pthread_mutex_t** cs = (pthread_mutex_t**)CriticalSectionObject; + + if (NULL != *cs) { + while (0 != pthread_mutex_destroy(*cs)); + free(*cs); + *cs = NULL; + } +} + +/** + * Enter to the Critical Section code. + * + * Take ownership over critical section object and execute the part of the code + * covered by the Critical Section object passed as parameter to the function. + * + * @param [in] CriticalSectionObject Pointer to the object used to exclusively + * lock some critical part of the code. + * + * @retval TRUE if Critical Section code entered successfully, otherwise FALSE. + */ +boolean Do_CriticalSection_Enter(CriticalSection_t CriticalSectionObject) +{ + pthread_mutex_t* cs = (pthread_mutex_t*)CriticalSectionObject; + if (NULL != cs) { + while (0 != pthread_mutex_lock(cs)); + } + + return TRUE; +} + +/** + * Leave the Critical Section code. + * + * Release the Critical Section object when finished execution to allow someone + * else to execute the code covered by the Critical Section object passed as + * parameter to the function. + * + * @param [in] CriticalSectionObject Pointer to the object used to exclusively + * lock some critical part of the code. + * + * @retval None. + */ +void Do_CriticalSection_Leave(CriticalSection_t CriticalSectionObject) +{ + pthread_mutex_t* cs = (pthread_mutex_t*)CriticalSectionObject; + if (NULL != cs) { + while (0 != pthread_mutex_unlock(cs)); + } +} + +/******************************************************************************* + * Definition of internal functions + ******************************************************************************/ + +/* @} */ |