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-rw-r--r--3rdparty/plibsys/src/psemaphore-amiga.c250
1 files changed, 250 insertions, 0 deletions
diff --git a/3rdparty/plibsys/src/psemaphore-amiga.c b/3rdparty/plibsys/src/psemaphore-amiga.c
new file mode 100644
index 0000000..bff0acf
--- /dev/null
+++ b/3rdparty/plibsys/src/psemaphore-amiga.c
@@ -0,0 +1,250 @@
+/*
+ * The MIT License
+ *
+ * Copyright (C) 2017-2018 Alexander Saprykin <saprykin.spb@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * 'Software'), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "perror.h"
+#include "pmem.h"
+#include "psemaphore.h"
+#include "pipc-private.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <exec/types.h>
+#include <exec/semaphores.h>
+#include <proto/exec.h>
+
+#define P_SEM_SUFFIX "_p_sem_object"
+#define P_SEM_PRIV_SIZE (sizeof (psize))
+
+struct PSemaphore_ {
+ struct SignalSemaphore *sem_shared;
+ pchar *platform_key;
+ pboolean is_owner;
+ PSemaphoreAccessMode mode;
+};
+
+static pboolean pp_semaphore_create_handle (PSemaphore *sem, PError **error);
+
+static pboolean
+pp_semaphore_create_handle (PSemaphore *sem,
+ PError **error)
+{
+ struct SignalSemaphore *sem_sys;
+ psize name_len;
+ pchar *name;
+
+ if (P_UNLIKELY (sem == NULL || sem->platform_key == NULL)) {
+ p_error_set_error_p (error,
+ (pint) P_ERROR_IPC_INVALID_ARGUMENT,
+ 0,
+ "Invalid input argument");
+ return FALSE;
+ }
+
+ IExec->Forbid ();
+
+ sem_sys = (struct SignalSemaphore *) IExec->FindSemaphore (sem->platform_key);
+
+ if (sem_sys != NULL && sem->mode != P_SEM_ACCESS_CREATE) {
+ sem->sem_shared = sem_sys;
+ } else {
+ if (sem_sys != NULL && sem->mode == P_SEM_ACCESS_CREATE) {
+ IExec->RemSemaphore (sem_sys);
+ IExec->ObtainSemaphore (sem_sys);
+ IExec->ReleaseSemaphore (sem_sys);
+
+ IExec->FreeVec (sem_sys->ss_Link.ln_Name);
+ IExec->FreeVec (((psize *) sem_sys) - 1);
+ }
+
+ sem_sys = (struct SignalSemaphore *) IExec->AllocVecTags (sizeof (struct SignalSemaphore) + P_SEM_PRIV_SIZE,
+ AVT_Type, MEMF_SHARED,
+ AVT_ClearWithValue, 0,
+ TAG_END);
+
+ if (P_UNLIKELY (sem_sys == NULL)) {
+ IExec->Permit ();
+ p_error_set_error_p (error,
+ (pint) P_ERROR_IPC_NO_RESOURCES,
+ 0,
+ "Failed to call AllocMem() to create semaphore");
+ return FALSE;
+ }
+
+ name_len = strlen (sem->platform_key);
+ name = (pchar *) IExec->AllocVecTags (name_len + 1,
+ AVT_ClearWithValue, 0,
+ TAG_END);
+
+ if (P_UNLIKELY (name == NULL)) {
+ IExec->FreeVec (sem_sys);
+ IExec->Permit ();
+ p_error_set_error_p (error,
+ (pint) P_ERROR_IPC_NO_RESOURCES,
+ 0,
+ "Failed to call AllocMem() to create semaphore name");
+ return FALSE;
+ }
+
+ memcpy (name, sem->platform_key, name_len);
+
+ /* Leave space in memory for counter */
+ sem_sys = (struct SignalSemaphore *) (((psize *) sem_sys) + 1);
+
+ sem_sys->ss_Link.ln_Name = name;
+ sem->sem_shared = sem_sys;
+
+ /* Add to system list */
+ IExec->AddSemaphore (sem_sys);
+ }
+
+ *(((psize *) sem_sys) - 1) += 1;
+
+ IExec->Permit ();
+
+ return TRUE;
+}
+
+P_LIB_API PSemaphore *
+p_semaphore_new (const pchar *name,
+ pint init_val,
+ PSemaphoreAccessMode mode,
+ PError **error)
+{
+ PSemaphore *ret;
+ pchar *new_name;
+
+ if (P_UNLIKELY (name == NULL || init_val < 0)) {
+ p_error_set_error_p (error,
+ (pint) P_ERROR_IPC_INVALID_ARGUMENT,
+ 0,
+ "Invalid input argument");
+ return NULL;
+ }
+
+ if (P_UNLIKELY ((ret = p_malloc0 (sizeof (PSemaphore))) == NULL)) {
+ p_error_set_error_p (error,
+ (pint) P_ERROR_IPC_NO_RESOURCES,
+ 0,
+ "Failed to allocate memory for semaphore");
+ return NULL;
+ }
+
+ if (P_UNLIKELY ((new_name = p_malloc0 (strlen (name) + strlen (P_SEM_SUFFIX) + 1)) == NULL)) {
+ p_error_set_error_p (error,
+ (pint) P_ERROR_IPC_NO_RESOURCES,
+ 0,
+ "Failed to allocate memory for semaphore");
+ p_free (ret);
+ return NULL;
+ }
+
+ strcpy (new_name, name);
+ strcat (new_name, P_SEM_SUFFIX);
+
+ ret->platform_key = p_ipc_get_platform_key (new_name, FALSE);
+ ret->mode = mode;
+
+ p_free (new_name);
+
+ if (P_UNLIKELY (pp_semaphore_create_handle (ret, error) == FALSE)) {
+ p_semaphore_free (ret);
+ return NULL;
+ }
+
+ return ret;
+}
+
+P_LIB_API void
+p_semaphore_take_ownership (PSemaphore *sem)
+{
+ if (P_UNLIKELY (sem == NULL))
+ return;
+
+ sem->is_owner = TRUE;
+}
+
+P_LIB_API pboolean
+p_semaphore_acquire (PSemaphore *sem,
+ PError **error)
+{
+ if (P_UNLIKELY (sem == NULL)) {
+ p_error_set_error_p (error,
+ (pint) P_ERROR_IPC_INVALID_ARGUMENT,
+ 0,
+ "Invalid input argument");
+ return FALSE;
+ }
+
+ IExec->ObtainSemaphore (sem->sem_shared);
+
+ return TRUE;
+}
+
+P_LIB_API pboolean
+p_semaphore_release (PSemaphore *sem,
+ PError **error)
+{
+ if (P_UNLIKELY (sem == NULL)) {
+ p_error_set_error_p (error,
+ (pint) P_ERROR_IPC_INVALID_ARGUMENT,
+ 0,
+ "Invalid input argument");
+ return FALSE;
+ }
+
+ IExec->ReleaseSemaphore (sem->sem_shared);
+
+ return TRUE;
+}
+
+P_LIB_API void
+p_semaphore_free (PSemaphore *sem)
+{
+ if (P_UNLIKELY (sem == NULL))
+ return;
+
+ if (P_UNLIKELY (sem->sem_shared != NULL)) {
+ IExec->Forbid ();
+
+ *(((psize *) sem->sem_shared) - 1) -= 1;
+
+ if (*(((psize *) sem->sem_shared) - 1) == 0 || sem->is_owner == TRUE) {
+ IExec->RemSemaphore (sem->sem_shared);
+ IExec->ObtainSemaphore (sem->sem_shared);
+ IExec->ReleaseSemaphore (sem->sem_shared);
+
+ IExec->FreeVec (sem->sem_shared->ss_Link.ln_Name);
+ IExec->FreeVec (((psize *) sem->sem_shared) - 1);
+ }
+
+ IExec->Permit ();
+ }
+
+ if (P_LIKELY (sem->platform_key != NULL))
+ p_free (sem->platform_key);
+
+ p_free (sem);
+}
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