context: move Mac swapcontext() to separate compilation unit

[cdsspec-compiler.git] / snapshot.cc

diff --git a/snapshot.cc b/snapshot.cc
index 6d6b45070b7c611699d9d14b0b620468ee173668..ba1c09034d6980bdfc1c841664c780668eee33b3 100644 (file)
--- a/snapshot.cc
+++ b/snapshot.cc
@@ -6,12 +6,12 @@
 #include <string.h>
 #include <errno.h>
 #include <sys/wait.h>
-#include <ucontext.h>
 
 #include "hashtable.h"
 #include "snapshot.h"
 #include "mymemory.h"
 #include "common.h"
+#include "context.h"
 
 #define FAILURE(mesg) { model_print("failed in the API: %s with errno relative message: %s\n", mesg, strerror(errno)); exit(EXIT_FAILURE); }
 
@@ -174,12 +174,12 @@ static void mprot_snapshot_init(unsigned int numbackingpages,
        void *basemySpace = model_malloc((numheappages + 1) * PAGESIZE);
        void *pagealignedbase = PageAlignAddressUpward(basemySpace);
        user_snapshot_space = create_mspace_with_base(pagealignedbase, numheappages * PAGESIZE, 1);
-       addMemoryRegionToSnapShot(pagealignedbase, numheappages);
+       snapshot_add_memory_region(pagealignedbase, numheappages);
 
        void *base_model_snapshot_space = model_malloc((numheappages + 1) * PAGESIZE);
        pagealignedbase = PageAlignAddressUpward(base_model_snapshot_space);
        model_snapshot_space = create_mspace_with_base(pagealignedbase, numheappages * PAGESIZE, 1);
-       addMemoryRegionToSnapShot(pagealignedbase, numheappages);
+       snapshot_add_memory_region(pagealignedbase, numheappages);
 
        entryPoint();
 }
@@ -247,8 +247,6 @@ static void mprot_roll_back(snapshot_id theID)
 
 #else /* !USE_MPROTECT_SNAPSHOT */
 
-#include <ucontext.h>
-
 #define SHARED_MEMORY_DEFAULT  (100 * ((size_t)1 << 20)) // 100mb for the shared memory
 #define STACK_SIZE_DEFAULT      (((size_t)1 << 20) * 20)  // 20 mb out of the above 100 mb for my stack
 
@@ -325,7 +323,7 @@ static void fork_snapshot_init(unsigned int numbackingpages,
        newContext.uc_stack.ss_size = STACK_SIZE_DEFAULT;
        makecontext(&newContext, entryPoint, 0);
        /* switch to a new entryPoint context, on a new stack */
-       swapcontext(&savedSnapshotContext, &newContext);
+       model_swapcontext(&savedSnapshotContext, &newContext);
 
        /* switch back here when takesnapshot is called */
        pid_t forkedID = 0;
@@ -369,7 +367,7 @@ static void fork_snapshot_init(unsigned int numbackingpages,
 
 static snapshot_id fork_take_snapshot()
 {
-       swapcontext(&savedUserSnapshotContext, &savedSnapshotContext);
+       model_swapcontext(&savedUserSnapshotContext, &savedSnapshotContext);
        DEBUG("TAKESNAPSHOT RETURN\n");
        return snapshotid;
 }
@@ -398,10 +396,11 @@ static void fork_roll_back(snapshot_id theID)
 
 #endif /* !USE_MPROTECT_SNAPSHOT */
 
-/** The initSnapshotLibrary function initializes the snapshot library.
- *  @param entryPoint the function that should run the program.
+/**
+ * @brief Initializes the snapshot system
+ * @param entryPoint the function that should run the program.
  */
-void initSnapshotLibrary(unsigned int numbackingpages,
+void snapshot_system_init(unsigned int numbackingpages,
                unsigned int numsnapshots, unsigned int nummemoryregions,
                unsigned int numheappages, VoidFuncPtr entryPoint)
 {
@@ -412,8 +411,8 @@ void initSnapshotLibrary(unsigned int numbackingpages,
 #endif
 }
 
-/** The addMemoryRegionToSnapShot function assumes that addr is page aligned. */
-void addMemoryRegionToSnapShot(void *addr, unsigned int numPages)
+/** Assumes that addr is page aligned. */
+void snapshot_add_memory_region(void *addr, unsigned int numPages)
 {
 #if USE_MPROTECT_SNAPSHOT
        mprot_add_to_snapshot(addr, numPages);
@@ -422,10 +421,10 @@ void addMemoryRegionToSnapShot(void *addr, unsigned int numPages)
 #endif
 }
 
-/** The takeSnapshot function takes a snapshot.
+/** Takes a snapshot of memory.
  * @return The snapshot identifier.
  */
-snapshot_id takeSnapshot()
+snapshot_id take_snapshot()
 {
 #if USE_MPROTECT_SNAPSHOT
        return mprot_take_snapshot();
@@ -434,10 +433,10 @@ snapshot_id takeSnapshot()
 #endif
 }
 
-/** The rollBack function rollback to the given snapshot identifier.
+/** Rolls the memory state back to the given snapshot identifier.
  *  @param theID is the snapshot identifier to rollback to.
  */
-void rollBack(snapshot_id theID)
+void snapshot_roll_back(snapshot_id theID)
 {
 #if USE_MPROTECT_SNAPSHOT
        mprot_roll_back(theID);