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src/os/linux/vm/os_linux.cpp
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*** 67,77 ****
#include "utilities/defaultStream.hpp"
#include "utilities/events.hpp"
#include "utilities/elfFile.hpp"
#include "utilities/growableArray.hpp"
#include "utilities/macros.hpp"
- #include "utilities/semaphore.hpp"
#include "utilities/vmError.hpp"
// put OS-includes here
# include <sys/types.h>
# include <sys/mman.h>
--- 67,76 ----
*** 2392,2436 ****
void* os::user_handler() {
return CAST_FROM_FN_PTR(void*, UserHandler);
}
! Semaphore::Semaphore(uint value, uint max) {
! guarantee(value <= max, "value lower than max");
! guarantee(max == Semaphore::NoMaxCount || max <= SEM_VALUE_MAX, "Max value set too high");
!
! int ret = sem_init(&_semaphore, 0, value);
! guarantee(ret == 0, "Failed to initialize semaphore");
! }
!
! Semaphore::~Semaphore() {
! sem_destroy(&_semaphore);
! }
!
! void Semaphore::signal() {
! int ret = sem_post(&_semaphore);
! guarantee(ret == 0, err_msg("sem_post failed: %d", ret));
! }
!
! void Semaphore::signal(uint count) {
! for (uint i = 0; i < count; i++) {
! signal();
! }
! }
!
! void Semaphore::wait() {
! while (sem_wait(&_semaphore) == -1 && errno == EINTR) {
! // Retry if the wait was interrupted by a signal.
! }
! }
!
! bool Semaphore::trywait() {
! return sem_trywait(&_semaphore) == 0;
! }
!
! bool Semaphore::timedwait(unsigned int sec, int nsec) {
struct timespec ts;
// Semaphore's are always associated with CLOCK_REALTIME
os::Linux::clock_gettime(CLOCK_REALTIME, &ts);
// see unpackTime for discussion on overflow checking
if (sec >= MAX_SECS) {
--- 2391,2405 ----
void* os::user_handler() {
return CAST_FROM_FN_PTR(void*, UserHandler);
}
! class LinuxSemaphore : public os::PosixSemaphore {
! public:
! LinuxSemaphore(uint value = 0) : os::PosixSemaphore(value) {}
+ bool timedwait(unsigned int sec, int nsec) {
struct timespec ts;
// Semaphore's are always associated with CLOCK_REALTIME
os::Linux::clock_gettime(CLOCK_REALTIME, &ts);
// see unpackTime for discussion on overflow checking
if (sec >= MAX_SECS) {
*** 2443,2465 ****
ts.tv_nsec -= NANOSECS_PER_SEC;
++ts.tv_sec; // note: this must be <= max_secs
}
}
! while (1) {
! int result = sem_timedwait(&_semaphore, &ts);
! if (result == 0) {
! return true;
! } else if (errno == EINTR) {
! continue;
! } else if (errno == ETIMEDOUT) {
! return false;
! } else {
! return false;
! }
}
! }
extern "C" {
typedef void (*sa_handler_t)(int);
typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
}
--- 2412,2424 ----
ts.tv_nsec -= NANOSECS_PER_SEC;
++ts.tv_sec; // note: this must be <= max_secs
}
}
! return os::PosixSemaphore::timedwait(ts);
}
! };
extern "C" {
typedef void (*sa_handler_t)(int);
typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
}
*** 2494,2504 ****
// a counter for each possible signal value
static volatile jint pending_signals[NSIG+1] = { 0 };
// Linux(POSIX) specific hand shaking semaphore.
static sem_t sig_sem;
! static Semaphore sr_semaphore;
void os::signal_init_pd() {
// Initialize signal structures
::memset((void*)pending_signals, 0, sizeof(pending_signals));
--- 2453,2463 ----
// a counter for each possible signal value
static volatile jint pending_signals[NSIG+1] = { 0 };
// Linux(POSIX) specific hand shaking semaphore.
static sem_t sig_sem;
! static LinuxSemaphore sr_semaphore;
void os::signal_init_pd() {
// Initialize signal structures
::memset((void*)pending_signals, 0, sizeof(pending_signals));
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