diff options
Diffstat (limited to 'lib/pure/reservedmem.nim')
| -rw-r--r-- | lib/pure/reservedmem.nim | 36 |
1 files changed, 20 insertions, 16 deletions
diff --git a/lib/pure/reservedmem.nim b/lib/pure/reservedmem.nim index cb1d4e06a..85a6e324f 100644 --- a/lib/pure/reservedmem.nim +++ b/lib/pure/reservedmem.nim @@ -56,7 +56,8 @@ when defined(windows): wProcessorLevel: uint16 wProcessorRevision: uint16 - proc getSystemInfo(lpSystemInfo: ptr SYSTEM_INFO) {.stdcall, dynlib: "kernel32", importc: "GetSystemInfo".} + proc getSystemInfo(lpSystemInfo: ptr SYSTEM_INFO) {.stdcall, + dynlib: "kernel32", importc: "GetSystemInfo".} proc getAllocationGranularity: uint = var sysInfo: SYSTEM_INFO @@ -66,12 +67,12 @@ when defined(windows): let allocationGranularity = getAllocationGranularity().int const - memNoAccess = MemAccessFlags(PAGE_NOACCESS) - memExec* = MemAccessFlags(PAGE_EXECUTE) - memExecRead* = MemAccessFlags(PAGE_EXECUTE_READ) + memNoAccess = MemAccessFlags(PAGE_NOACCESS) + memExec* = MemAccessFlags(PAGE_EXECUTE) + memExecRead* = MemAccessFlags(PAGE_EXECUTE_READ) memExecReadWrite* = MemAccessFlags(PAGE_EXECUTE_READWRITE) - memRead* = MemAccessFlags(PAGE_READONLY) - memReadWrite* = MemAccessFlags(PAGE_READWRITE) + memRead* = MemAccessFlags(PAGE_READONLY) + memReadWrite* = MemAccessFlags(PAGE_READWRITE) template check(expr) = let r = expr @@ -84,12 +85,12 @@ else: let allocationGranularity = sysconf(SC_PAGESIZE) let - memNoAccess = MemAccessFlags(PROT_NONE) - memExec* = MemAccessFlags(PROT_EXEC) - memExecRead* = MemAccessFlags(PROT_EXEC or PROT_READ) + memNoAccess = MemAccessFlags(PROT_NONE) + memExec* = MemAccessFlags(PROT_EXEC) + memExecRead* = MemAccessFlags(PROT_EXEC or PROT_READ) memExecReadWrite* = MemAccessFlags(PROT_EXEC or PROT_READ or PROT_WRITE) - memRead* = MemAccessFlags(PROT_READ) - memReadWrite* = MemAccessFlags(PROT_READ or PROT_WRITE) + memRead* = MemAccessFlags(PROT_READ) + memReadWrite* = MemAccessFlags(PROT_READ or PROT_WRITE) template check(expr) = if not expr: @@ -125,14 +126,16 @@ proc init*(T: type ReservedMem, let commitSize = nextAlignedOffset(initCommitLen, allocationGranularity) when defined(windows): - result.memStart = virtualAlloc(memStart, maxLen, MEM_RESERVE, accessFlags.cint) + result.memStart = virtualAlloc(memStart, maxLen, MEM_RESERVE, + accessFlags.cint) check result.memStart if commitSize > 0: - check virtualAlloc(result.memStart, commitSize, MEM_COMMIT, accessFlags.cint) + check virtualAlloc(result.memStart, commitSize, MEM_COMMIT, + accessFlags.cint) else: var allocFlags = MAP_PRIVATE or MAP_ANONYMOUS # or MAP_NORESERVE - # if memStart != nil: - # allocFlags = allocFlags or MAP_FIXED_NOREPLACE + # if memStart != nil: + # allocFlags = allocFlags or MAP_FIXED_NOREPLACE result.memStart = mmap(memStart, maxLen, PROT_NONE, allocFlags, -1, 0) check result.memStart != MAP_FAILED if commitSize > 0: @@ -164,7 +167,8 @@ proc setLen*(m: var ReservedMem, newLen: int) = check virtualAlloc(m.committedMemEnd, commitExtensionSize, MEM_COMMIT, m.accessFlags.cint) else: - check mprotect(m.committedMemEnd, commitExtensionSize, m.accessFlags.cint) == 0 + check mprotect(m.committedMemEnd, commitExtensionSize, + m.accessFlags.cint) == 0 else: let d = distance(m.usedMemEnd, m.committedMemEnd) - m.maxCommittedAndUnusedPages * allocationGranularity |